Rna transcripts of lactose-utilizing genes within e. coli indicates the presence of lactose.
What is operon?
An operon is a collection of genes that all share a single promoter during transcription, found in bateria.There are regulatory DNA sequences in every operon, and these sequences serve as binding sites for regulatory proteins that either encourage or hinder transcription.Regulatory proteins frequently attach to tiny molecules, which can alter the protein's capacity to bind DNA and turn it on or off.Some operons are inducible, which means that a specific tiny molecule can activate them. Others can be turned off by a single molecule and are repressible, which means they are switched on by default.one example of operon is Lac operon of E. coli contains genes involved in lactose metabolism. It's expressed only when lactose is present and glucose is absent.Learn more about the Lac operon with the help of the given link:
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In which stage of mitosis does exchange of genetic material between chromosomes (crossing over) occur?
Meiosis's pachytene substage of prophase I is when crossing over occurs, but the diplotene substage of prophase I is when it becomes evident. Tetrads will be formed when the homologous chromosomes align with one another.
DNA sequences may be swapped between the homologous chromosomes during this lining up. It facilitates character mixing, resulting in the production of both parental and recombinant forms. Crossing over is the term for the form of genetic recombination that enables the meiotic daughter cells to differ genetically from one another.
Only chromosomes that are homologous can cross across. After meiosis I, cells turn haploid and are no longer capable of crossing across.
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An example of homeostasis in living organisms is.............
a. cooling effect resulting from evaporation of water from the body surface
b. root hairs of a plant growing towards a source of light
c. changing of the body color of a chameleon to match the color of the foliage on which it is resting
d. the release of phosphorus into the phloem of a plant growing in a phosphorus deficient soil.
PLS HELP ASAP to choose the correct option
Answer:
d. the release of phosphorus into the phloem of a plant growing in a phosphorus deficient soil.
Explanation:
Homeostasis is a living organism's way of maintaining a stable internal environment even in the event of external environmental changes. When the plant keeps supplying phosphorus to the phloem even in the case of a deficiency in the soil, it maintains a steady balance on its inside irrespective of the lack in the soil.
Autoimmune diseases are an example of a(n) ________ response by the immune system.
When a shockable rhythm is present during cardiac arrest and a biphasic manual defibrillator is available, the initial energy level selected should be:________
When shockable rhythm is present during cardiac arrest and biphasic manual defibrillator is available, the initial energy selected should be between 120 - 200J
If a person goes into cardiac arrest immediately start CPR and also provide oxygen and connect a defibrillator if available. Continue CPR for 5 cycles and check for shockable rhythm.
If a shockable rhythm is observed, use the biphasic manual defibrillator for the initial shock at 120 - 200 J based on the device. Then check for a pulse. If a pulse is present, begin the post resuscitation care.
If there is no pulse or asystolic, then start the CPR cycle again until the shockable rhythm is observed. Then shock at 200J using a biphasic manual defibrillator.
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what is enviroment and its importance?
Hi! Your answer is below! I made it as brief as I could.
There are many definitions, meanings, and interpretations for the word "environment," which is frequently used. What is meant by the word "environment"? In common usage, the word "environment" might simply mean "nature" to some people, which refers to the natural environment and all of its non-human qualities, traits, and processes. For those individuals, the concept of the environment is frequently strongly tied to ideas of wilderness and pristine landscapes that have not been affected by human activity, or have only been minimally affected. For some others, however, the term "environment" also contains certain human components. Many individuals would consider pastoral and agricultural landscapes to be a component of the environment, while others are even more comprehensive and believe that the environment includes all features of the earth's surface, including metropolitan regions. Therefore, in common usage, the concept of the "environment" is linked to a variety of assumptions and attitudes that are frequently unsaid but may be firmly held. All of these applications, however, share a common underlying presumption: that humans and the "environment" have some sort of relationship. As a result, the environment serves as the "backdrop" to different aspects of human history, including the habitats and resources that people use, the "hinterland" that surrounds habitations, and the "wilderness" that people have not yet tamed or subjugated.
The word "environment" simply means "surroundings" (environs) in its most basic meaning, therefore any other entity that a person, object, element, or system is surrounded by is considered a part of that entity's environment. Individuals, things, components, and systems, however, seldom live in isolation in reality; rather, they frequently engage in a variety of interactions with the entities around them. Therefore, conceptualizing the "environment" without incorporating some sort of relational idea is not especially helpful. People, things, elements, and systems all have an impact on and are in turn affected by their environment. In certain instances, the networks of connections between various entities may be enormous and extremely complicated. As a result, the "environment" may be thought of as a "space" or "field" where networks of connections, interactions, and relationships between entities take place. Such a conceptualization will be recognizable to individuals who have studied ecology because ecologists are interested in both the biotic (living) and abiotic (non-living) components of environmental systems, particularly their interactions. In reality, the terms "environment" and "ecosystem," which refer to a community of interacting species and their physical surroundings, are sometimes used synonymously in ecological contexts. Since many environmental problems have resulted from the disruption or degradation of one environmental system as a result of changes made to another, whether unintentionally or on purpose, the idea of interconnectedness is crucial to environmental science and management.
The environment is made up of all things, both living and nonliving, that affect people. It is essential to the operation of our daily life. There was the environment/nature and its magnificent species even before there was a human home. Every species, whether on land or in the sea, coexisted peacefully. There was unrest following the start of human civilization and industry. Humans started using the environment as a tool to achieve goals without thinking about the consequences of their actions or the respect they should have for the supporter of life on Earth.
Here are a few justifications on why the environment is crucial:
We receive both renewable and non-renewable materials from the environment.Without natural resources like the sun, moon, water, land, and air, human existence would not be conceivable.Genetic diversity and variation are provided by the environment, which are necessary for life to flourish.The environment aids in the disposal of waste produced during the production and consumption of products and services, which is generally in the form of rubbish.Our environment includes the mountains, rivers, lakes, deserts, and other natural areas that we appreciate.Thank you,
Eddie
Studies on identical twins have found that differences in genes explain ________ of the variability in personality traits.
Studies on identical twins have found that differences in genes explain 50% of the variability in personality traits.
According to twin studies on personality, genetic influences account for around half of personality variation, with environmental factors causing individuals from the same family to have different personalities accounting for the remaining half. However, these conclusions are supported by quantitative models of human individual differences that calculate genetic and environmental contributions as constants across entire populations.
According to genetic studies, there are 5.2 genetic mutations that separate identical twins on average. Although the same set of genes are used to create identical twins, human development is not entirely genetic. Another factor is the surroundings. The degree to which genetic variation contributes to variation in a specific characteristic can be ascertained by contrasting concordance rates of identical twins and concordance rates of fraternal twins.
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What might happen if a substance that is not a substrate molecule binds to an enzyme's active site?
If a substance which is not a substrate happens to bind to the active site of an enzyme, it will result in the reduction of the activity of the enzyme.
For an enzyme to catalyze a reaction, a substrate has to come and bind to the active site which is present on the enzyme. As the substrates binds, some modifications occur resulting in a change of shape of the active site and results in the grasping of the substrate more tightly and thereby catalyzing the reaction.
If a substance which is not a substrate comes and takes the place of the substrate on the active site, the rate of the reaction will slow down as the active site will now not be able to bind to the target molecule.
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WBC count that can cause turbidity in the cyanmethemoglobin method resulting to falsely high hemoglobin value:_____.
A very high WBC count can lead to turbidity in the cyanmethemoglobin method resulting in falsely high hemoglobin value.
Cyanmethemoglobin method is a method which is used for the estimation of hemoglobin. In this method, hemoglobin is converted to cyanmethemoglobin by adding ferricyanide and potassium cyanide. The absorbance is then measured at 540nm using a spectrophotometer.
This is a very advantageous method as it is able to measure all forms of hemoglobin except sulphaemoglonin and also since spectrophotometer is used, subjective errors are avoided. But, if the WBC count is very high, it can lead to turbidity in the cyanmethemoglobin method resulting in falsely high hemoglobin value.
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Calcitonin _________ osteoclast activity, which will _________ blood calcium levels.
Calcitonin suppress osteoclast activity, which will lowers blood calcium levels.
What is Calcitonin?Calcitonin is a hormone secreted by thyroid gland.Calcitonin reduces the concentration of blood calcium level when it is above normal level.This polypetide hormone is made up of 32 amino acid and is mainly produced by C cells of the thyroid gland.In fish, birds and other non-mammalian animals, Calcitonin is produced by cells of the ultimobranchial body.To learn more about thyroid gland, refer :
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Answer: Calcitonin inhibits osteoclast activity, which will decrease blood calcium levels.
Explanation: I have same question on my review. Calcitonin decreases blood calcium levels by inhibiting osteoclast activity.
The dna double helix is made up of two strands of ______ monomers oriented in opposite directions. multiple choice question.
The DNA double helix is made up of two strands of nucleotide monomers oriented in opposite directions. multiple choice question.
DNA nucleotides link up to form units referred to as base pairs, A with T and C with G. A sugar and phosphate molecule are also joined to each base. A nucleotide is made up of a base, a sugar, and a phosphate. The double helix is a spiral formed by two long strands of nucleotides.The information molecule is DNA. It contains information needed to create proteins, which are other big molecules. These instructions are dispersed throughout 46 lengthy structures called chromosomes that are found inside each of your cells. Numerous smaller pieces of DNA, known as genes, make up these chromosomes.learn more about DNA here: https://brainly.com/question/16099437
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What are the odds of finding the energy concentrated on just a few molecules in a macroscopically-measurable sample?
The odds of finding the energy concentrated on just a few molecules in a macroscopically-measurable sample are very less likely.
If energy was only concentrated onto one molecule, the law of entropy is not followed because the system becomes organized into that one molecule only and the other molecules do not have energy. Due to the property of entropy, the energy will more likely be spread among all molecules rather than just one molecule.
Free atoms have greater entropy than molecules. The entropy of a substance increases with its molecular weight and complexity and with temperature.
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The narrow space between the axon terminal and the motor end plate is called the:_______
a) vesicle
b) synaptic
c) cleft
d) sarcolemma
e) axon
The narrow space between the axon terminal and the motor end plate is called the synaptic.
What is synaptic?The places of contact between neurons known as synapses are where information is transferred from one neuron to the next. Presynaptic neuron, synaptic cleft, and postsynaptic neuron are the three components of synapses, which most frequently occur between axons and dendrites.Synaptic connections between brain cells are the points at which electrical signals are transferred from one nerve cell to another. The synaptic gap is when nerve signals jump from one nerve cell to another.The tiny space between two neurons known as a synapse is where a neurotransmitter relays nerve impulses from the axon of a presynaptic neuron to the dendrite of a postsynaptic neuron. The term "synaptic cleft" or "synaptic gap" is used to describe it.The purpose of synapses is to send electrical signals between two neurons or between a neuron and a muscle cell. Synapses allow one neuron to communicate with another, which enables messages to travel from the nerves to the brain and vice versa.
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Which type of selection acts to eliminate individuals which are intermediate on a phenotypic range?
Disruptive selection acts to eliminate individuals which are intermediate on a phenotypic range.
What is disruptive selection?Extreme values of a trait are preferred above intermediate values in population genetic alterations known as disruptive selection, also known as diversifying selection. In this situation, the trait's variation rises and the population is split into two clearly defined groups.A population that has two extreme variants of a trait as the dominant phenotype is the result of disruptive selection. For instance, disruptive selection would be in play if both short and tall species, but not medium-sized organisms, were favored.A type of natural selection in which traits with extreme values are preferred over those with moderate values.A type of natural selection known as stabilizing selection is one in which genetic diversity declines as the population stabilizes on a particular trait value.Natural selection that discriminates against the typical person in a population is known as disruptive selection. This kind of population would consist primarily of phenotypes (individuals having sets of features) at either extreme and very few individuals in the middle.Learn more about disruptive selection here:
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Which white blood cell phagocytizes microorganisms and becomes a macrophage in the tissue?
Monocytes are white blood cell that phagocytizes microorganisms and becomes a macrophage in the tissue
Monocytes, a subtype of white blood cells, give rise to macrophages. When monocytes travel from the bloodstream to the tissues, they develop into macrophages. A monocyte is a subtype of phagocyte and a type of white blood cell. Enlarge. plasma cells.
White blood cells (monocytes, lymphocytes, neutrophils, eosinophils, basophils, and macrophages), red blood cells (erythrocytes), and platelets are among the various cell types found in the blood.
It may also be related to several cancers, particularly leukemia. When you are recuperating from an acute infection, a high monocyte count may happen. Your body could be more prone to infection if your monocyte count is low. Infection is one cause of a decreased white blood cell count.
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Mammalian steroid hormones are signaling molecules that function in which type of cell signaling?.
The correct answer is endocrine.
What is steroid hormones?The steroids that are made virtually solely in the adrenal glands are cortisol, 11-deoxycortisol, aldosterone, corticosterone, and 11-deoxycorti-coaster one. Most different steroid hormones, including the estrogens, are produced by the adrenal glands and the gonadsSteroids have an essential role in growth, development, sexual differentiation, and reproduction. All four categories of steroids, androgens, estrogens, progestogens, and glucocorticoids, contain varying impacts on the brain.Insulin is a protein chain or peptide hormone. There are 51 amino acids in an insulin molecule. It has a molecular weight of 5808 Da. Insulin is created in the islets of Langerhans in the pancreas.To learn more about steroid hormones, refer to:
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What are the two main parts of pangaea and the modern continents that each one eventually become
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What gas is required for optimum production of adenosine triphosphate (atp)?
a. argon
b. carbon dioxide
c. nitrous oxide
d. oxygen
If the frequency of one allele in a population is 0. 7 in a population with two alleles at a particular locus, what is the frequency of the alternate allele?
According to Hardy- Weinberg principle, if the frequency of one allele in a population with two alleles is 0.7 at a particular locus, then the frequency of alternate allele is 0.3.
What is Hardy- Weinberg equilibrium?Hardy- Weinberg rule states that in the absence of disturbing factors, the genetic variability in a population remains constant in different generations. It states that when mating is random both the genotypic and allelic frequencies remain constant as they are in equilibrium.Hardy- Weinberg rule applies to a large population where mating is random and there is no migration.It is given by p + q = 1, where p is the frequency of dominant allele in the population, q is the frequency of recessive allele in the population.By squaring, p2+ 2pq+ q2= 1, where p2 is percentage of homozygous dominant individuals, q2 is percentage of homozygous recessive individuals. 2pq is percentage of heterozygous individuals.Here given, p= 0.7, therefore q= 1- 0.7= 0.3Learn more about Hardy- Weinberg equilibrium here:
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How might a mutation in either a hormone or its receptor affect the physiological system that it normally regulates?
A mutation in either a hormone or its receptor might affect the physiological system that it normally regulates by either blocking hormone effect or creating a completely different effect.
Hormones can be called chemical messengers which coordinate distinct functions in the body. Many glands, organs and tissues produce and release hormones, many of which constitute the endocrine system.
A hormone will only act on a part of the body if it fits i.e. if the cells in the target tissue have receptors which can receive the message of the hormone. Given that hormones carry instructions in their structure, mutations alter their structures by changing nucleic acid sequences which blocks hormone function.
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Select the correct answer from each drop-down menu.
When Raymond observes certain natural phenomena, he often forms Ideas about their causes and effects. Suppose that Raymond
surmises that leaves change color in autumn due to scarcity of sunlight. In order to test whether his idea is accurate, he must first
construct a falsifiable
that defines a clear relationship between two variables. Raymond's next step is to
that would Isolate and test the relationship between the two variables. This task can be pretty
variables that could confuse test results.
daunting because Raymond will need to identify and eliminate any
The answers for each of the drop-down menu are:
Hypothesis Design and experimentConfoundingWhat is confounding in experimental design?The confounding design is known to be a type of a design where some treatment effects (such as the main or interactions effect) are said to be approximated by the same linear association of the experimental observations as some blocking effects.
Note that an hypothesis is said to be a kind of preplanned or proposed explanation for any kind of a phenomenon that occurs in an experiment.
Therefore based on the issue of Raymond, The answers for each of the drop-down menu are:
Hypothesis Design and experimentConfoundingLearn more about Hypothesis from
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See full question below
Select the correct answer from each drop-down menu.
When Raymond observes certain natural phenomena, he often forms ideas about their causes and effects. Suppose that Raymond surmises that leaves change color in autumn due to scarcity of sunlight. In order to test whether his idea is accurate, he must first construct a falsifiable [THEORY/LAW/HYPOTHESIS] that defines a clear relationship between two variables. Raymond's next step is to [DESIGN AN EXPERIMENT/COMPLETE MATHEMATICAL CALCULATIONS/PROPOSE AND EXPLANATION] that would isolate and test the relationship between the two variables. This task can be pretty daunting because Raymond will need to identify and eliminate any [CONFOUNDING/DEPENDENT/INDEPENDENT] variables that could confuse test results.
Which hormone released by the highlighted structure inhibits the secretion of fsh only inhibin?
Inhibin hormone released by the highlighted structure inhibits the secretion of FSH only.
What is inhibin hormone?A protein called inhibin is secreted by the granulosa cells in women and the Sertoli cells in men. It decreases the amount of LH-releasing hormone in the hypothalamus and prevents the pituitary gland from producing and releasing follicle-stimulating hormone.Inhibin is a factor in the feedback control of FSH secretion in both males and females going through puberty. Follistatin suppresses FSH-subunit expression like inhibin, whereas activin enhances it, which in turn influences FSH production and secretion.Inhibin A is secreted by the corpora lutea and dominant ovarian follicles in women, which helps to explain why levels are so high during the late follicular and luteal stages. During the late luteal and early follicular phases of the menstrual cycle, inhibin B is reciprocally raised.Learn more about inhibin here:
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Question: Which hormone released by the highlighted structure inhibits the secretion of FSH only?
The type of growth that a population may show when food and habitat are limitless is called?
A type of growth that a population may show when food and habitat are limitless is exponential population growth.
What is exponential population growth?The case in which resources are limitless a population can experience exponential population growth where the size increases at a greater rate.
Exponential growth occurs when there is large quantity of resources are present and few individuals are there to utilize it
When number of individuals increases the resources will depleted and growth rate will slow down.
Therefore, exponential population growth is the type of growth in which resources are plenty in comparison of population.
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Collecting tubules merge to form the ducts of bellini.
a. true
b. false
It is true that the collecting tubules merge to form the ducts of Bellini.
Papillary ducts or collecting ducts or the renal collecting tubules were formerly known as the ducts of Bellini. They are structures which are present in the distal portion of the collecting ducts in our kidneys.
These ducts are formed when collecting tubules merge. They receive the renal filtrate, which is the precursor to urine, from a number of medullary collecting ducts and it empties into a minor calyx. These ducts regulate the reabsorption of water and also balances the electrolytes.
Hence option a is the correct option.
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What organism began to grow in large numbers in lake washington as a result of the relaase of effluent from sewage treatment plans?
Cyanobacteria (blue-green algae) began to grow in large numbers in lake Washington as a result of the release of effluent from sewage treatment plans. Human activities have a big impact on water quality, but other, more subtle biological processes are also quite important.
An intriguing illustration of how anthropogenic factors and biological processes can change water quality is Lake Washington. The late Dr. W.T. Edmondson, spent many years researching the biology and chemistry of Lake Washington.Between 1941 and 1963, the lake received growing amounts of secondary processed sewage, which led to eutrophication and a decrease in the lake's water quality. From 1955 to 1973, cyanobacteria dominated the planktonic algae community.
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Ethical dilemmas raised by dna technology and knowledge of the human genome include?
Ethical dilemmas raised by DNA technology and knowledge of the human genome include the potential for interfering in evolution, the safety of GM foods and the potential discrimination against people predisposed to certain diseases.
What about DNA?Recombinant DNA technology raises safety concerns such as "gene pollution" of the environment leading to "superweeds" and antibiotic-resistant microorganisms. Health impacts of GMO-containing food. Effectiveness of medicinal substances created using DNA technology, allergenicity, and adverse immunological reactions.Basic human mistake and bias, accusing the innocent of crimes, privacy rights, and an increase in racial inequities are some of these problems. Researchers Itiel Dror and Greg Hampikian discovered in their widely cited study from 2011 that forensic professionals and lab technicians had quite different perspectives on how to analyze DNA.Germline genome editing raises a number of bioethical concerns, including the possibility of unintended modifications to the genome, who should provide informed consent, how to do so, and the breeding of the human species (eugenics).Learn more about DNA here:
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Question: Ethical dilemmas raised by DNA technology and knowledge of the human genome include ______.
A. the potential for interfering in evolution
B. the safety of GM foods
C. the potential discrimination against people predisposed to certain diseases
D. all of the above
Researchers isolated peptidoglycan from a eukaryotic cell. The best explanation for this would be that?
Studies have shown that the peptidoglycan in eukaryotes is essential for their cell division and tumor cell formation.
Commonly, peptidoglycan (PG) is the component of the cell wall of prokaryotes, especially bacteria.
Recent discovery of endogenous synthesis of peptidoglycan in eukaryotes stated that the amount of PG difference between animals and bacteria becomes quantitative and no longer qualitative.
Some propose that bacterial surface components, whose synthesis is encoded in genes inherited by the eukaryotes from the ancestors of the organelles, may play a role in inter and intracellular communication.
This is the reason that PG synthesis can be correlated to two of the most fundamental processes in higher organisms, i.e. cell division, Aging and tumor formation.
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Salivary amylase is an enzyme released from the salivary glands that breaks some of the chemical bonds in?
Saliva contains the enzyme, salivary amylase. This enzyme breaks the bonds between the monomeric sugar units of disaccharides, oligosaccharides, and starches.
The salivary amylase breaks down amylose and amylopectin into smaller chains of glucose, called dextrins and maltose.
Saliva contains special enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which your body can more easily absorb.
For eg- Amylase is responsible for the breaking of the bonds in starches, polysaccharides, and complex carbohydrates into easier to absorb simple sugars. Salivary amylase is the first step in the chemical digestion of food.
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How many African Americans are carriers of the sickle-cell allele?
1 in 100
1 in 11
1 in 500
1 in 50
Answer:
Sickle cell trait is an inherited blood disorder that affects 1 million to 3 million Americans and 8 to 10 percent of African Americans.
Sickle cell anemia is an autosomal recessive disorder that is carried by 1 in 500 African Americans, according to the National Institute of Health (NIH).
Sickle cell anemia occurs due to mutation in the beta chain of the hemoglobin molecule, where the glutamic acid at the 6th position of chromosome 11 is substituted by valine.
Having a sickle cell trait cannot cause disorder because the person with the sickle cell trait only contains one allele containing this mutation. Contrary to this, a patient with Sickle cell anemia has a mutation in both alleles.
The African populations were most prone to malaria, and sickle cell trait evolved as a mechanism of defense against malaria. Having the Sickle cell trait helps in fighting the malarial pathogen.
Apart from the African American population, people having ancestors from Sub-Saharan, South Asian, Middle Eastern, Central, and South American origin are also prone to contain the Sickle cell trait.
This concludes that people of African American origin are prone to inherit the sickle cell trait from their ancestors, and about 1 in every 500 people will be a carrier of this allele.
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Describe how ADH affects the kidney tubules to bring about the relationship
The Antidiuretic hormone ( ADH ) affects the kidney tubules tp bring about the reabsorption of water in the glomerular filtrate.
Thus, the Antidiuretic hormone ( ADH ) also play a vital role in the kidney in homeostasis
What is homeostasis?Homeostasis can simply be defined as the steady maintenance of the internal environment of an organism. Living organisms usually find a way to balance any low or high concentration of substances in the internal environment
Below are what makes up the internal environment of an organism:
BloodLymphIntercellular fluidsSo therefore, cell structures involved releases glucagon to raises the blood glucose levels when the glucose levels in the blood is low
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Based on your understanding of fruit fly phenotypes, which tobacco plant phenotype would be considered the wild type phenotype?
Based on the understanding of fruit fly phenotypes, the wild type phenotype of tobacco plant shows following characteristics:-
The stem is thick and not much branched.The leaves of the plant are lanceolate, tapering on both the ends, yellowish-green above and paler beneath.The plant has sticky hair on all of its parts.And the flowers are lavender-blue with yellow stamens, in compact clusters at ends of branches.A wild type phenotype is the one that predominates in a natural population of organisms in contrast to that of laboratory mutant forms. For example-the physical appearance of wild type flies includes red eyes, yellow-brown body color, as well as transverse black rings across their abdomen.
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