A Final statement or concluding statement
Correct answer is ‘B’ .
Stabilizing selective pressures result in limited evolutionary changes
How do selective pressures affect evolution?Stabilizing selection is a type of natural selection that results in a decrease in genetic diversity and the stabilization of population traits over time.
Selective pressures are thought to be forces that drive evolution through natural selection.
Depending on the external conditions, some phenotypes are more advantageous than others.
A phenotype is a specific way that genes are expressed in an organism's physical traits or characteristics.
To work, selective pressure must have at least two possible phenotypes for members of a population to exhibit.
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What is the procedure of voter identification intended to help prevent fraudulent voting and keep the process organized?
Registration is the process of voter identification intended to help to prevent fraudulent voting and keep the procedure organized. It is helpful in case of fraudulent votes.
Registration is the process of knowing the identity of the voter. it is helpful in preventing fraudulent votes. It helps in knowing that the person from that country and also a genuine person.
Purge is simply the process of reviewing the lists of registered voters and removing the name of the persons who are no longer available or eligible.
In the election system, there is a need for Voter list maintenance in which names of the persons of the country are available.
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What kind of weathering involves only a reduction in the sizes of bedrock, regolith, and mineral particles?
Mechanical weathering involves only a reduction in the sizes of bedrock, regolith, and mineral particles.
What is weathering?Weathering is the process of breakdown or wearing of rocks, minerals in the presence of water, atmospheric conditions.Weathering is of 3 types: physical, chemical and biological.Physical or mechanical weathering involves mechanical processes which cause the rock to break. The major factor causing physical weathering is water which can break the rock at point of cracks.Chemical weathering involves the breakdown of rocks due to chemical reactions occurring between the minerals in rocks and the environment. The chemicals from acid rain, moving water can react with minerals in rocks and weaken them resulting in breaking of rocks.Biological weathering is the breakdown of rocks due to action of plants, animals and microorganisms in the soil.Learn more about weathering here:
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Cell division is regulated by two major genes..
division.
A. proto-oncogenes, oncogenes
B. tumor suppressor genes, proto-oncogenes
C. proto-oncogenes, tumor suppressor genes
D. oncogenes, tumor suppressor genes
stimulate cell division and
inhibits cell
Cell division is regulated by two major genes D. oncogenes, and tumor suppressor genes, which stimulate cell division and, inhibit cells.
Cell division is the technique by the way which a parent cell divides, whilst a mother cell divides into or greater daughter cells. cellular department commonly takes vicinity as a part of a bigger cell cycle. In eukaryotes, there are distinct sorts of cell division that take place.
Cell division is the manner wherein a parent cell divides, giving a push to 2 or greater daughter cells. it is a crucial biological method in every lifestyle. cell division is fundamental to all residing organisms and required for increase and improvement. As a crucial approach to reproduction for all dwelling matters, the cell department allows organisms to switch their genetic fabric to their offspring.
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The inner cellular layer of trophoblast that remains intact inside the blastocyst is termed the?
The inner cellular layer of trophoblast that remains intact inside the blastocyst is termed Cytotrophoblast.
Cytotrophoblast is the inner layer of the trophoblast.
It is found on the outer side of the Blastocyst and inner side of the Syncytiotrophoblast.
Cytotrophoblast remains intact inside the blastocyst and is present as a inner cellular layer of trophoblast.
Cytotrophoblast produces several hormones like:
GnRHProgesteroneHCGEstrogenCytotrophoblast attaches the fetus that is growing to the uterine wall of the mother's body.
It plays an important role in embyro's transplantation.
Cytotrophoblast releases Proteinaceous enzymes between the endometrial cells allowing many finger-like projections.
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Why p-nitrophenolphosphate → p-nitrophenol is an ideal reaction for this laboratory assay?
Protein, alkaline, and acid phosphatases are all measured using the non-specific, non-proteinaceous substrate known as p-Nitrophenyl Phosphate (PNPP). So, it is an ideal reaction for this laboratory assay.
What is p-nitrophenolphosphate ?In ELISA and traditional spectrophotometric experiments, para-Nitrophenylphosphate (pNPP) is a non-proteinaceous chromogenic substrate for alkaline and acid phosphatases.The hydrolysis of pNPP by phosphatases releases inorganic phosphate and the conjugate base of para-nitrophenol (pNP).The resultant phenolate has a maximum absorbance at 405 nm and is yellow in colour.Alkaline phosphatase (AP) and protein tyrosine phosphatase are two phosphatases that can be measured using this characteristic (PTP).The material needs to be stored in a dark, shielded area because it is light-sensitive. Before reading and after incorporating the substrate into the mixture, this is equally crucial.Learn more about p-nitrophenolphosphate here:
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Burning wood is a reverse reaction of photosynthesis. knowing this, what products would be formed?
Water and carbon dioxide are formed when Burning wood is a reverse reaction of photosynthesis.
The chemical process of photosynthesis is the reverse of combustion and cellular respiration. During photosynthesis, light energy converts carbon dioxide and water into glucose and oxygen. Respiration is said to be the reverse of photosynthesis. In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct.
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Atp is thermodynamically suited as a carrier of phosphoryl groups in animal cells because of all except?
ATP is thermodynamically suited as a carrier of phosphoryl groups in animal cells because of all except it is hydrolyzed in cells without enzyme action.
Why is ATP used as energy source?The energy currency of the cell is ATP as it releases a large amount of energy on the release of second and third phosphate group. To be hydrolyzed, ATP requires enzyme action. The structure of ATP consists of adenosine backbone, ribose sugar bound to three phosphate groups.It is stable inside the cells and also functions as a signaling molecule, helps in synthesis of DNA and RNA.Most of the ATP is synthesized in the mitochondria through aerobic respiration.ATP serves as a carrier of phosphoryl group because it is stable and used as an intermediate for group transfer reactions.Learn more about ATP here:
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this procedure for measuring cell size has certain limitations . List three such limitations
The limitations of cell size are:
1) Surface area to volume ratio
2) Nucleo cytoplasmic ratio
3) Fragility of cell membrane
What are the cause of limitations on cell size?
The need for a surface area of sufficient area to allow the cells function→.
→If the surface area of cell increase volume increase to the cube of the linear increase.
→ Nuclie contains information needed for protein synthesis . Some cells reduce this limitation to increase the no. Of nucleus called multinucleated.
Examples are muscle cells.
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Measuring cell size has specific limitations
Exterior area to volume ratio Nucleo cytoplasmic proportion The fragility of cell membraneThe key element that limits the size of a cell is the ratio of its surface area to its volume.
What limits the sizes to which cells can grow?
One statement is that cell sizes are limited by surface-to-volume ratios. Cells that are too large in volume may be determined by the rate at which nutrients are taken up, which in turn is limited by the cell's membrane exterior area.
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How does intestinal failure affect the body? carbon dioxide builds up in the body. carbon dioxide builds up in the body. energy is not given to the body. energy is not given to the body. oxygen does not make it to the brain. oxygen does not make it to the brain. blood is not moved in the body.
Answer:
Its energy is not given to body
Explanation:
Intestinal failure is basically like where your intestines is slow and has no energy.
What protein in brown adipose tissue help to dissipate heat in hibernating mammals during winter?
UCP1 (uncoupling protein 1) in brown adipose tissue help to dissipate heat in hibernating mammals during winter.
What is the purpose of uncoupling proteins in mammalian brown adipose tissue?
The uncoupling protein, also known as thermogenin, is a 33 kDa inner-membrane mitochondrial protein that is found only in brown adipocytes in mammals. It serves as a proton transporter, allowing the proton gradient produced by the respiratory chain to be dissipated as heat and uncoupling oxidative phosphorylation in the process.
Uncoupling protein 1 (UCP1) is a membrane protein that is present in the mitochondrial inner membrane of brown adipose tissue and helps mammals produce heat without shuddering. By including an uncoupler (FCCP), you can reduce the proton motive force and raise the level of cellular respiration by causing a short circuit of protons on the inner mitochondrial membrane. Substrate oxidation is the primary indicator of oxygen consumption in this condition.
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Which answer correctly identifies the part of the human vision system that is part of the retina?
a. visual cortex
b. rods
c. optic nerve
d. pupil
Rods identifies the part of the human vision system that is part of the retina. The correct option is b.
What are rods?Rods are photoreceptor cells found in the retina. They are photosensitive and contribute to our ability to see well in low light.
They are focused in the retina's outer regions and provide us with field of vision. Rods are 500 to 1,000 times more light perceptive than cones.
Regardless of the fact that cone-mediated eyesight dominates perception in typical daytime light levels, the overall number of rods in the human retina far outnumbers the number of cones.
Thus, the correct option is b.
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If you were looking to change your work on stomata to suit your awake-at-night personality, with which plants would you choose to work?
When testing a four-wheel drive electronic component, the technician will use a scan tool to pull codes, and then a ________ to diagnose any codes found.
Answer: Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Explanation:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
This is for bio , translation and transcription genetics labelling help me pls
Protein kinase a, which stimulates glycogen degradation, is activated directly by?
Protein kinase a, which stimulates glycogen degradation, is activated directly bym cyclic AMP.
What is glycogen?Animals, fungi, and bacteria all use the multibranched polysaccharide of glucose known as glycogen to store energy. The primary form of glucose storage in the body is represented by the polysaccharide structure.Our cells primarily use glucose as fuel. The liver and muscles store the glucose when the body doesn't need to use it for energy. Glycogen is the name given to this form of glucose that is stored and is composed of several linked glucose molecules.Although only liver glycogen directly contributes to the release of glucose into the circulation, maintaining a healthy blood glucose concentration is one of glycogen's key functions.The body uses glycogen as a major energy reserve.For instance, liver glycogen controls homeostasis and blood sugar levels.On the other hand, muscle glycogen aids in physical exercise by allowing skeletal muscles to contract.
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A botanist scrapes pollen off a flower of one plant and then uses it to pollinate the flower of another plant. What can be scientifically concluded
about their offspring?
A. They will have a large amount of genetic variation.
B. They will have twice the number of chromosomes as their parents.
C. They will be genetically distinct from their parents.
D. They will be able to reproduce only asexually.
Answer:
C. They will be genetically distinct from their parents.
Explanation:
It is clear that a botanist assisted in the sexual reproduction of plants since pollen was removed from one plant's blossom and used to pollinate the flower of another.
Two separate gametes from two different parents are mingled during sexual reproduction, which aids in the generation of genetically distinct children since each gamete may carry different gene alleles, expanding the population's gene pool.
The children will be genetically diverse from their parents as a result.
The scientifically concluded statement about the offspring in this scenario is: They will be genetically distinct from their parents. The correct option is C.
When a botanist scrapes pollen from one plant and uses it to pollinate the flower of another plant, it is a form of artificial cross-pollination.
This process introduces genetic material from one plant to another, promoting genetic recombination.
Through cross-pollination, the offspring inherit genetic material from both parent plants, resulting in a combination of genetic traits.
This genetic mixing leads to genetic distinctiveness in the offspring compared to their parents.
The offspring may exhibit traits and characteristics that are a combination or variation of those present in the parent plants.
Thus, the correct option is C.
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________ deafness results from conditions in the outer or middle ear that block the transfer of vibrations from the environment to the tympanic membrane or to the oval window.
Answer:
Conductive deafness
conductive deafness results from conditions in the outer or middle ear that block the transfer of vibrations from the environment to the tympanic membrane or to the oval window.
What are the components of external and middle part of ear ?It is the most sensitive organ can detect, transmit and transduce sound energy and Maintain the balance, sense of the body.
External part of the Ear consist of two parts such as Auricle or Pinna which have elastic cartilage and funnel like curves that helps to collect sound waves, transmits them to the middle ear.
Middle Ear have Tympanic Cavity which is an air-filled cavity separated from the external ear and it also consist of an eustachian tube, an auditory tube; Tympanic Membrane which separates the middle ear from the external ear and receives, amplifies the sound waves.
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_____ deafness results from conditions in the outer or middle ear that block the transfer of vibrations from the environment to the tympanic membrane or to the oval window.
A) Sensory
B) Nerve
C) Conductive
D) Mechanical
E) Macular
What event was khrushchev speaking of when he said the world had come close to ""destroying the human race""?
The Cuban missile crisis was the event Nikita Khrushchev was speaking of when he said the world had come close to "destroying the human race".
The Cuban Missile Crisis, also known as the October Crisis of 1962, the Caribbean Crisis or the Missile Scare, was a 35-day (16 October – 20 November 1962) confrontation between the United States and the Soviet Union, which escalated into an international crisis when American deployments of missiles in Italy and Turkey were matched by Soviet deployments of similar ballistic missiles in Cuba. Despite the short time frame, the Cuban Missile Crisis remains a defining moment in US national security and nuclear war preparation. The confrontation is often considered the closest the Cold War came to escalating into a full-scale nuclear war.
In response to the presence of American Jupiter ballistic missiles in Italy and Turkey, and the failed Bay of Pigs Invasion of 1961, Soviet First Secretary Nikita Khrushchev agreed to Cuba's request to place nuclear missiles on the island to deter a future invasion. An agreement was reached during a secret meeting between Khrushchev and Cuban Prime Minister Fidel Castro in July 1962, and construction of a number of missile launch facilities started later that summer.
The missiles in Cuba allowed the Soviets to effectively target most of the Continental US. The planned arsenal was forty launchers. The Cuban populace readily noticed the arrival and deployment of the missiles and hundreds of reports reached Miami. US intelligence received countless reports, many of dubious quality or even laughable, most of which could be dismissed as describing defensive missiles.
Only five reports bothered the analysts. They described large trucks passing through towns at night that were carrying very long canvas-covered cylindrical objects that could not make turns through towns without backing up and maneuvering. Defensive missile transporters, it was believed, could make such turns without undue difficulty. The reports could not be satisfactorily dismissed.
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The Cuban missile crisis was the event Nikita Khrushchev was speaking of when he said the world had come close to "destroying the human race".
The Cuban Missile Crisis, also known as the Missile Scare, the Missile Crisis of 1962, or the Caribbean Crisis, the October Crisis of 1962 was a 35-day standoff between the United States and the Soviet Union that turned into a global crisis when American missile deployments in Italy and Turkey were matched by Soviet deployments of similar ballistic missiles in Cuba.
The Cuban Missile Crisis continues to be a pivotal moment in US national security and nuclear war planning despite its brief duration. The conflict is frequently seen as the point where the Cold War almost broke out into a full-fledged nuclear conflict.
After the unsuccessful Bay of Pigs invasion in 1961 and the discovery of American Jupiter ballistic missiles in Italy and Turkey, Soviet First Secretary Nikita Khrushchev
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Which response would the nruse provide to the mother questionining why her teenage daughter was foolish and became pregnant?
"Although teenagers can intellectually discuss birth control, they don't believe that they will become pregnant."
Teenagers are capable of cognitively understanding the risk of unprotected sex but often believe themselves invulnerable, which leads to risk-taking behaviours.
Sexual activity may be impulsive, which is not conducive to a discussion; also, adolescents who are developing their sense of sexuality may feel too insecure to raise this discussion.
Birth control, also known as contraception, anticonception, and fertility control, is a method or device used to prevent pregnancy. Birth control has been used since ancient times, but effective and safe methods of birth control only became available in the 20th century. Planning, making available, and using birth control is called family planning. Some cultures limit or discourage access to birth control because they consider it to be morally, religiously, or politically undesirable. The term birth control is a bit of a misnomer since abortion is not regularly considered under the term.
In teenagers, pregnancies are at greater risk of poor outcomes. Comprehensive sex education and access to birth control decreases the rate of unwanted pregnancies in this age group. While all forms of birth control can generally be used by young people, long-acting reversible birth control such as implants, IUDs, or vaginal rings are more successful in reducing rates of teenage pregnancy. After the delivery of a child, a woman who is not exclusively breastfeeding may become pregnant again after as few as four to six weeks. Some methods of birth control can be started immediately following the birth, while others require a delay of up to six months. In women who are breastfeeding, progestin-only methods are preferred over combined oral birth control pills. In women who have reached menopause, it is recommended that birth control be continued for one year after the last period.
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Determine the correct sequence of events during the creation of recombinant dna. i. plasmid is cut open with enzymes ii. target gene is cut out with enzymes iii. plasmid is inserted into the bacterium iv. target gene is bonded to the plasmid with ligase
Answer:
ii i iv iii
Explanation:
The correct sequence is
Target gene is cut out with enzyme Plasmid if cut open with enzyme Target gene is bounded to the plasmid with ligase Plasmid is inserted into the bacterium
Which character trait is most closely associated with elevated risk of cardiovascular disease?
Hostility trait is most closely associated with an elevated risk of cardiovascular disease
Conditions affecting the heart or blood vessels are collectively referred to as cardiovascular disease (CVD). Atherosclerosis, a buildup of fatty deposits inside the arteries, and a higher risk of blood clots are typically connected with it.
Unhealthy eating, inactivity, usage of tobacco products, and abusing alcohol are the main behavioral risk factors for cardiovascular disease and stroke. Individuals may experience elevated blood pressure, elevated blood glucose, elevated blood lipids, as well as overweight and obesity as a result of behavioral risk factors.
Although there is no known cure for cardiovascular disease, medication can help manage the symptoms and lower the risk of issues like heart attacks
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The international union for conservation of nature added what species to the endangered red list?.
The International Union for Conservation of Nature has added more than 41,000 endangered species to the endangered red list.
What is Red List of Threatened Species?Created in 1964, the International Union for the Conservation of Nature and Natural Resources (IUCN) Red List of Threatened Species aims to inform society and researchers around the planet about the conservation of living beings. It presents relevant information about the fauna and flora of the planet, but does not present data about microorganisms.
What is conservation of nature?Nature conservation is the moral philosophy and conservation movement focused on protecting species from extinction, maintaining and restoring habitats, enhancing ecosystem services, and protecting biological diversity.
With this information, we can conclude that The Red List, by informing conservation data, serves as an alert about the constant loss of biodiversity verified on Earth.
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As the tide rises and the water flows towards the sea shore, the plants growing at the sea shores wilt. What process is responsible for such effect? A osmosis B diffusion C transpiration D active transport
Answer:
A. Osmosis
Explanation:
When plants are placed into a strong sugar or salt solution water will pass out of the cells by osmosis. As water passes out, the sap vacuole starts to shrink. These cells are no longer firm they are limp. We say that they are flaccid and the plant will wilt.
The process that is responsible for this effect is known as osmosis. Thus, the correct option for this question is A.
What is Osmosis?Osmosis may be defined as the process that significantly involves the movement of solute molecules from a lower concentration to a higher concentration of solution through a semipermeable membrane. It is the net movement of water across a semipermeable membrane.
It is very frequently observed that when plants are exposed to a strong sugar or salt solution, water will eventually be passed out of the cells through the process known as osmosis. As water passes out, the vacuole within the cell starts to shrink. It can be said that they are flaccid and the plant will definitely be in the process of wilting.
Therefore, the process that is responsible for this effect is known as osmosis. Thus, the correct option for this question is A.
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Give four functions of the mouth in the digestive process
Answer:
receive food by ingestionbreak it into small particles by masticationmix it with salivamoistens foodAnswer:
The four functions of the mouth in the digestive process is given below:
Explanation:
1. Digestive process starts from mouth.
2. It moistens food so it move more easily through esophagus into stomach.
3. Mouth produces saliva which has an enzyme that begins to break down starches in food.
4. Mouth chews food and digestion involves breaking down the food into simpler nutrients that can be used by cells.
In aerobic respiration, nadh is oxidized at _____, while fadh2 is oxidized at _____.
Complex 1
Complex 2
In aerobic respiration, NADH is oxidized at Complex 1, while FADH2 is oxidized at Complex 2.
What is aerobic respiration?In the presence of oxygen gas, cells undergo cellular respiration, which is how energy from food is produced. The majority of plants, animals, birds, humans, and other mammals all engage in this sort of respiration regularly. As byproducts of this process, water and carbon dioxide are created.Which five steps make up aerobic respiration?Glycolysis, pyruvate oxidation, Krebs's cycle, the electron transport chain, and chemiosmosis are the five steps that must occur for aerobic respiration to take place.What is glycolysis?A cytoplasmic mechanism called glycolysis converts glucose into two molecules with three carbons each and releases energy. Hexokinase, a phosphorylating enzyme, assists in the phosphorylation process that traps glucose. This reaction uses adenosine triphosphate (ATP), and the end result, glucose-6-P, inhibits hexokinase.What is pyruvate oxidation?It takes place in the cytoplasm of prokaryotes. Overall, pyruvate oxidation transforms the three-carbon molecule into the two-carbon molecule acetyl CoA , C, o, A, which is attached to Coenzyme A. This results in a NADH , N, A, D, H, and the release of one carbon dioxide molecule.What is Krebs cycle?The primary source of energy for cells and an essential component of aerobic respiration is the tricarboxylic acid (TCA) cycle, sometimes referred to as the Krebs or citric acid cycle. The cycle converts the acetyl coenzyme A (acetyl CoA) chemical energy into the reducing force of nicotinamide adenine dinucleotide (NADH).What is Electron transport chain?The oxidative phosphorylation process, also known as the electron transport chain, is a collection of four protein complexes that combine redox events to produce an electrochemical gradient that results in the production of ATP. Both photosynthesis and cellular respiration take place in mitochondria.What is chemiosmosis?The process of ions (often H+ ions, commonly referred to as protons) diffusing across a membrane that is selectively permeable is known as chemiosmosis. Chemiosmosis produces a concentration gradient of the diffusing ion across the membrane, similar to osmosis. Potential energy that can perform work is present in concentration gradients.To learn more about aerobic respiration visit:
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Every year _______ species go extinct. a. 3 b. 72 c. 1000 d. 20000 please select the best answer from the choices provided
The experts calculate that between 0.01 and 0.1% of all species will become extinct each year. If the low estimate of the number of species out there is true - i.e. that there are around 2 million different species on our planet - then that means between 200 and 2,000 extinctions occur every year.
What is extinction?
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence.More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, mammoths, ground sloths, thylacines, trilobites and golden toads.Through evolution, species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche and species become extinct when they are no longer able to survive in changing conditions or against superior competition. The relationship between animals and their ecological niches has been firmly established. A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive with little to no morphological change for hundreds of millions of years.To learn more about extinction: https://brainly.com/question/14482178
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The cerebral cortex receives blood from the anterior, middle, and posterior ________ arteries.
The cerebral cortex receives blood from the anterior, middle, and posterior Carotid arteries.
About cerebral cortex:
Cerebral cortex controls the motor activities and reacts on the basis of sensations received through the thalamus. The cerebral cortex, which controls motor actions, receives sensations from the thalamus and responds accordingly. Essentially, the brain receives blood flow from four arteries: paired internal carotid arteries and paired vertebral arteries. At the ventral side of the pons, two vertebral arteries combine to produce the basilar artery, which then splits into the posterior cerebral arteries. The anterior and middle cerebral arteries emerge from the internal carotid artery. The arterial circle of Willis is formed by the communication between the anterior, middle, and posterior cerebral arteries.Learn more about the cerebral cortex with the help of the given link:
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Individuals with glucose-6-phosphate dehydrogenase deficiency have increased resistance to malaria because the parasite does not survive well in cells with?
Individuals with glucose-6-phosphate dehydrogenase deficiency have increased resistance to malaria because the parasite does not survive well in cells with oxidative stress.
What is the link between G6P deficiency and malaria?Glucose-6-phosphate dehydrogenase (G6PD) deficiency is an X-linked recessive disorder. G6PD protects cells from oxidative damage especially the RBCs whose main function is to carry oxygen.Mutation in the gene results in G6PD deficiency leading to oxidative stress which can lead to anemia (iron deficiency) as there is breakdown of RBCs.However, G6PD deficiency is quite common in parts of Africa, Middle East, and South Asia, which are the regions of high malaria endemism.This is due to natural selection in which G6PD deficiency is not eliminated from the population as it can protect people from malaria infection.Malaria parasite Plasmodium species does not survive well in cells with oxidative stress.Learn about malaria here:
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In a fetus, the ductus arteriosus is the fetal connection between the pulmonary trunk and which structure(s)?
In a fetus, the ductus arteriosus is the fetal connection between the pulmonary trunk and the aorta.
The ductus arteriosus is a normal blood vessel that forms a connection between two main arteries i.e. the aorta and the pulmonary artery which carries blood away from the heart. The lungs are not active while a fetus is in the womb as the baby receives oxygen directly from the mother's placenta.
The fetal lungs are filled with amniotic fluid hence, they cannot be used to oxygenate the blood. Also, the arterioles in the lungs are constricted, which limits the amount of blood that can pass through the pulmonary system.
As the fetal blood leaving the placenta is already rich in oxygen and the lungs are non-functional, thereby, the ductus arteriosus permits a part of this blood to detour the pulmonary circulation to enter directly into the systemic circulation.
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What are the major functions of nucleotides and nucleic acids? what three components are found in these substances? what component makes them acids?
Answer:
Explanation:
The major function of nucleotides and nucleic acids is to hold genetic information. The three components found in them are : a)sugar molecule
b)phosphate group c) A nitrogen base. The phosphate group is what makes the acidic.
What is a nucleotide?A nucleotide/nucleic acid is responsible for laying the foundation of genetic information in an organismA nucleotide consists of :
a) Pentose sugar: A 5-carbon sugar molecule.
b)Nitrogen base: There are two types of nitrogenous bases: Purines and Pyrimidines.
Two types of purine bases : Adenine(A) and Guanine(G)
Three types of pyrimidine bases : Cytosine(C), Thymine(T) and Uracil(U)
RNA consists of A,U,G,C
DNA consists of A,T,G ,C
c)Phosphate group
The acidic nature of nucleotides/nucleic acids comes from the phosphate group. This is because it is gives away a proton(H+ ions), giving it an acidic character.To learn more about nucleotides , refer:
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