Answer:
The correct answer is option d- none of these.
Explanation:
The genetic code for methionne is AUG and genetic code for isoleucine are AUC, AUA, AUU. As we can see that there are first two codons are similar for both methionine and isoleucine.
So mutation at to any other site other than third psostion not possible that can convert isoleucine to methionine and this same mutation site is the only mutation position mutation can revere back methionine to isoleucine.
Thus, none of the given can restore an isoleucine codon.
The skin is protected by the action of cells that arise from bone marrow and migrate to the epidermis. Which cells serve this function?
Answer:
Langerhan's cells
Explanation:
The Langerhan's cells arise from the bone marrow and migrate to the epidermis. The Langerhan's cells are the body's first line of defense and play a significant role in antigen presentation. They need special stains to be visualized and are primarily found in the stratum spinosum. These are the mesenchymal origin obtained from CD34 positive stem cells of bone marrow and are part of the mononuclear phagocytic system.
g 20. Name two bones connected by an interosseous membrane found in the crus and/or sural region. Which one is the medial bone
Answer:
Tibia and fibula. Tibia (medial bone)
Explanation:
The tibia is the medial bone of the lower leg (it is the second-largest bone next to the femur), whereas the fibula is the lateral bone of the lower leg. The tibia functions to transmit the majority of the force in the lower leg. The tibia articulates at the proximal end with the femur and fibula; where this bone (tibia) articulates at the distal end with the fibula and the talus bone of the ankle. The tibia and fibula are connected via an interosseous membrane, which is a thin sheet of connective tissue that spans the space between two bones.
Below are portions of a haplotype sequence from three individuals. Each base represents a SNP found at a distinct position in the genome. Which of these haplotypes are most closely related based upon the SNPs provided here?
Haplotype
A 5'...ATCGATAATCCCCTTAG...3
B 5'...ATTGATCATCCCCTAAG...3
C 5'...ATCTATCATCAGATACG...3
a. A, B, and C are all similarly related
b. A and B
c. B and C
d. A and C
The correct answer is A and B
why are cross section leaves placed in water immedietely are being cut
Answer:
Although the cuticle provides important protection from excessive water loss, leaves cannot be impervious because they must also allow carbon dioxide in (to be used in photosynthesis), and oxygen out.
Explanation:
Read each description below regarding the the CNS control of the ANS.
a. It's the integrating centers for reflexes controlling heart rate and blood pressure.
b. It activates the fight-or-flight response.
c. It's the integrating center for thermoregulaton.
d. Sexual thoughts or images can increase blood flow to the genitals.
e. It's the major control center of the ANS.
1. Cerebral Cortex
2. Hypothalamus
3. Brainstem
4. Spinal Cord
(1)The cerebral cortex, also known as the cerebral mantle, is the outer layer of neural tissue of the cerebrum of the brain in humans and other mammals. The cerebral cortex mostly consists of the six-layered neocortex, with just 10% consisting of allocortex.
(2)The hypothalamus is a small region of the brain. It's located at the base of the brain, near the pituitary gland. While it's very small, the hypothalamus plays a crucial role in many important functions, including: releasing hormones. regulating body temperature.
(3) The brainstem (or brain stem) is the posterior stalk-like part of the brain that connects the cerebrum with the spinal cord. In the human brain the brainstem is composed of the midbrain, the pons, and the medulla oblongata Ten pairs of cranial nerves come from the brainstem.
(4)The spinal cord is a long, fragile tubelike structure that begins at the end of the brain stem and continues down almost to the bottom of the spine. The spinal cord consists of bundles of nerve axons forming pathways that carry incoming and outgoing messages between the brain and the rest of the body.
The right optic tract: A. carries information from the lateral halves of both retinae. B. carries information from the medial halves of both retinae. C. carries information from the lateral half of the retina (right e
Answer:
The optic tract carries retinal information relating to the whole visual field. Specifically, the right optic tract corresponds to the left visual field.
Explanation:
make slogan about showing care of environment and natures
plant trees at least every year and keep atmosphere clear
Because the bell jar in the model lung cannot move, any changes in volume are a result solely of the movement of the rubber diaphragm. Match the position of the rubber diaphragm to changes in volume and pressure inside the bell jar and balloon size.
a. Galloons inflate
b. Balloons deflate
c. Volume inside bell jar increases
d. Volume inside bell jar decreases
e. Pressure inside bell jar decreases
f. Pressure inside bell jar increases
1. Rubber diaphragm up
2. Rubber diaphragm down
Answer:
1. Rubber diaphragm up-
b. Balloons deflate
d. Volume inside bell jar decreases
f. Pressure inside bell jar increases
2. Rubber diaphragm down-
a. Galloons inflate
c. Volume inside bell jar increases
e. Pressure inside bell jar decreases
Explanation:
The rubber diaphragm is the model to demonstart the various parts of the respiratory system and how they move during breathing process. In case of it moves down, the rubber diaphragm is stretched, the volume inside the bell jar increases which causes presursue decrease.
Balloon inhale or sucks in the air from outside and gets inflate. this increases the volume in the jar. The pressure is increased
IN____________ NUTRITION , THE ORGANISMS DEPEND UPON ITS HOST FOR ITS FOOD .
Answer:
heterotrophic nutrition!!
An adult giraffe (Giraffa camelopardalis) has a heart that lies approximately 2 m below the top of the head when its neck is fully extended. Calculate the minimum diastolic pressure that a giraffe must have (in mm Hg). Hint: what is the absolute minimum blood pressure a giraffe could have at the very top of its head
Answer:
159.01 mmHg
Explanation:
position of Heart = 2m below the top of the head given that the neck is fully extended
Determine the minimum diastolic pressure
Minimum diastolic Pressure = 1060 kg/m^3 * 10 m/s^2 * 2m
= 21200 kg/m^2
convert the value to Pa
21200 kg/m^2 = 21200 Pa
( 1 pa = 0.00750062 mmHg )
Therefore : minimum diastolic pressure = 21200 * 0.00750062 = 159.01 mmHg
The minimum diastolic pressure that a giraffe must have is 150 mmHg
Diastolic Blood pressureDiastolic Blood pressure is the pressure on the walls of your arteries between heartbeats, that is when the heart is resting.
The minimum diastolic diastolic blood pressure = absolute minimum blood pressure a giraffe could have at the very top of its head.Pressure formulaP = hpg
where;
P = pressure
h = height difference
p = density
g = acceleration due to gravity
Density of blood = 1000 kg/m^3
h =2.0 m
g = 10 m/s^2
Pressure = 1000 × 2.0 × 10
Pressure = 20000 Pascal or 20 kpa
Converting to mmHg1 kpa = 7.50 mmHg
20 kpa = 20 × 7.50
Pressure = 150 mmHg
Therefore, the minimum diastolic pressure that a giraffe must have is 150 mmHg
Learn more about diastolic blood pressure at: https://brainly.com/question/14661197
Help me out with this again, pretty please?
(2nd time)
I need explanation for your answers, even though it's multiple choices, I still need your explanation for it.
DUE TOMORROW!
If your answer is NONSENSE it will be deleted as soon as possible!
But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!
Which of the following sentences uses commas correctly? Carol was the last person out of the house wasn't, she? Carol was the last person, out of the house wasn't she? Carol was the last person out of the house, wasn't she? Carol, was the last person out of the house wasn't she?
Answer:
The third sentence......................
Explanation:
The correct sentence is Carol was the last person out of the house, wasn't she?
Why is a comma important?Commas help your reader figure out which words go together in a sentence and which parts of your sentences are most important. Using commas incorrectly may confuse the reader, signal ignorance of writing rules, or indicate carelessness.
What are the Rules of commas?Comma Rules
Use a comma after an introductory phrase or clause. Use commas before and after a parenthetical phrase or clause. Use a comma to separate two independent clauses linked by a coordinating conjunction (and, but, for, nor or, so, yet) Use a comma to separate items in a series.Learn more about the use of commas here https://brainly.com/question/2251561
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What methods help control pollution source
Practicing conservation tillage traps contaminants from Runoff water. Practicing conservation tillage helps prevent BLANK
A. Air pollution
B. Water pollution
C. Soil erosion
Please help!! Need the Correct Answer ASAP!!
Which statement is true?
A.Peat is a fossil fuel because rewetting it takes only 3–5 years.
B.Peat is a fossil fuel because the total time for restoration is lengthy.
C.Peat is not a fossil fuel because it has biologic origins, making it a biofuel.
D.Peat is not a fossil fuel because humans can promote the replenishment of peat.
Answer:
c) peat is not a fossil fuel because it has biologic origins, making it biofuel
Explanation:
Peat is soil/ turf
Match each of the following descriptions with the correct brain structure(s). Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
a. houses the corpora quadrigemina
b. components of the diencephalon
c. connects the third and fourth ventricles
d. continuous with the spinal cord
e. produces cerebrospinal fluid
f. components of the brainstem
g. major homeostatic organ
h. contains Broca's area
i. structure from which pineal gland extends
j. contains lateral ventricles
k. contains arbor vitae
1. pons
2. thalamus
3. cerebellum
4. hypothalamus
5. cerebral aqueduct
6. medulla oblongata
7. midbrain
8. epithalamus
9. cerebrum
10. choroid plexus
Answer:
a. midbrain
b. thalamus; hypothalamus, epithalamus
c. cerebral aqueduct
d. medulla oblongata
e. choroid plexus
f. pons; medulla oblongata; midbrain
g. hypothalamus
h. cerebrum
i. epithalamus
j. cerebrum
k. cerebellum
Explanation:
The brainstem is the posterior part of the brain that connects the cerebrum with the spinal cord. The brainstem can be divided into three parts: midbrain (i.e., mesencephalon), the pons (i.e., metencephalon), and the medulla oblongata (i.e., myelencephalon). The mesencephalon is a region of the brain composed of the tectum and tegmentum, which play fundamental roles in motor movement, auditory and visual processing. The corpora quadrigemina is found at the tectum region of the midbrain. The diencephalon is a small part of the brain located above the brainstem (between cerebral hemispheres); which contains the thalamus, hypothalamus, subthalamus, and epithalamus. In turn, the epithalamus is composed of the habenular nuclei, pineal gland, and the stria medullaris thalami. The cerebral aqueduct is a narrow channel (approx. 15 mm) in which the cerebrospinal fluid flows between the third ventricle and the fourth ventricle. The medulla oblongata is a long stem-like structure located in the brainstem of the brain, just in the place where the brainstem connects the brain to the spinal cord. The choroid plexus is a complex network of capillaries located at the cerebral ventricles of the brain, which serve to produce cerebrospinal fluid through ependymal cells that line the ventricles of the brain. The cerebellum is a major structure of the hindbrain and consists of the cerebellar cortex and a core of white matter having the cerebellar nuclei.
The importance of water properties on plants and animals
The importance of water properties on plants and animals.
Answer:The importance of water in plants is that it helps plants to make their own food, because water plays a very important role in Photosynthesis, and as well it helps them to grow.
The important of water in animals is that it is main need for animals to survive as well as humans. Without water even a single organism won't exist in this Earth.
Hope it helps you :)The human body is made up of more than three-fourths of water, and all animals and plants require water to thrive.
Why water is essential for plants and animals?Water is used by all living things to transport nutrients throughout the body and remove waste. Among its many crucial functions, water aids in the digestion of food and the preservation of organisms' heat.
The term "universal solvent" refers to water's enormous capacity to dissolve a wide range of molecules, and it is this capacity that makes water such a priceless life-sustaining agent.
Water's function as a solvent aids cells in the transfer and utilization of molecules like oxygen or nutrients on a biological level.
Therefore, to do all the cellular processes by plants and animals there is need of water.
Learn more about water, here:
https://brainly.com/question/7977819
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Which group of bacteria reduces nitrate to nitrogen gas in the nitrogen cycle? Nitrogen fixing bacteria C. denitrifying bacteria Ammonium ion forming bacteria D. photosynthetic bacteria
Answer:
C. denitrifying bacteria
Explanation:
Nitrogen cycle consists of series of processes that add and remove nitrogen from the soil and atmosphere. There are several ways in which nitrogen can be added to the atmosphere including nitrification, ammonification, lightning etc.
Certain bacteria are responsible for the conversion of nitrogen from one compound form to another. In a process called DENITRIFICATION, nitrate (NO3-), which is the usable form of nitrogen by plants, is converted back to atmospheric nitrogen (N2) with the help of a bacteria called DENITRIFYING BACTERIA e.g Pseudomonas etc.
Using sophisticated molecular cloning techniques, you have isolated the genes for two serotonin transporters, called TransA and TransB, which are expressed in these neuronal cells. A preliminary immunofluores- cence localization of fixed and permeabilized cells found very bright staining of TransA at the nerve cell plasma membrane and little staining elsewhere. TransB, in contrast, stained only very faintly at the nerve cell plasma membrane, but there was intense staining within the cytosol.
Required:
In which subcellular membrane or organelle would you expect most of the TransB to be found? Explain your answer.
Answer:
Vesicles
Explanation:
Serotonin is a neurotransmitter that transports signals or messages between neurons.
Most neuronal cells have vesicles in their interior, which are organelles that store neurotransmitters for exportation -by exocytosis- or from recycling -by endocytosis-. These vesicles also protect the neurotransmitter from the enzymatic action.
Vesicles form in the cellular soma, from where they are transported to nervous terminals. Once the vesicle releases the neurotransmitter to the intercellular space, their membrane remains available in the plasmatic membrane to be reused.
The neurotransmitter concentration in the vesicle interior is related to the storage system and the transport system. There are specialized transporter proteins in the vesicle membrane that are involved with the introduction of the molecule to the organelle.
In the exposed example, transporter Trans B might be located in the vesicle membranes, and hence could be found in the cytosol of the cells.
7. The sun's surface is about
a. 2000 °C
b. 3000 °C
c. 4000 °C
d. 5000 °C
(;´༎ຶٹ༎ຶ`)
Answer:
5778C ...................,.....
3. The DNA double helix is stabilized by hydrogen bonds between:
Answer:
Between Dioxide and Ribonuse AcidExplanation:
hope it helps
Answer:
The structure of the DNA helix is stabilized by van der Waals forces, hydrogen bonds between complementary organic bases (a base pair), and hydrophobic interactions between the nitrogenous bases and the surrounding sheath of water
What do proteins, nucleic acids, and carbohydrates all have in common?
An example of a pressure vessel is
Answer:
A closed container designed to hold gases or liquids at a pressure substantially higher or lower than the ambient pressure
In the lung alveoli, the oxygen partial pressure is about 100 mm of mercury, or 0.13 Atm. If blood was solely composed of a saline solution (lacking any hemoglobin), oxygen equilibrates with the alveolar air to a concentration of about 3 mg/L or 0.093 mm). In oxygen-saturated blood, however, the O2 concentration is about 0.008 M (8 mm).
Required:
a. What is the Henry's Law constant for oxygen in saline?
b. What is the Henry's Law constant for oxygen in blood?
c. How much does the presence of hemoglobin enhance oxygen solubility in blood (i.e. what is the ratio in blood vs saline)?
Answer:
Picture is attached.
For the following three cultures, using any resource find out if they are obligate aerobes, facultative anaerobe, or obligate anaerobe- o Escherichia coli o Micrococcus luteus o Clostridium sporogenes
Answer:
Escherichia coli - Facultative anaerobe
Micrococcus luteus - Obligate aerobe
Clostridium sporogenes - Obligate anaerobe
Explanation:
In simple terms, obligate aerobes are organisms that require oxygen to grow and metabolize molecules such as fats and sugars to produce energy. Many animals fall under this category. Other examples are Mycobacterium tuberculosis and Micrococcus luteus.
Facultative anaerobes are organisms (usually bacteria) that can grow both in the presence and absence of oxygen. The most example of this are the Escherichia coli.
Obligate anaerobes are organisms (usually microorganisms) that cannot survive when exposed to normal atmospheric concentration of oxygen. Examples are Clostridium sporogenes and Clostridium botulinum.
One of the most important outcomes of extreme stress or tension is the effect on the ___________ system, which usually protects use from invading toxins and micro-organisms that can negatively impact our health.
Answer:
Immune
Explanation:
The immune system helps to protect our body from all sort of organisms ranging from invading toxins and micro-organisms which negatively affects an individual’s health and well being.
Stress has an adverse effect on the immune system such that it weakens and suppresses the functions of the required antibodies in the body system. This is the reason why many aged people fall sick because they have gone through more stress when compared to younger people.
A biologist thinks the population of chipmunks will be in the range of 2900 to 3100 in the year 2000. Is that a reasonable guess? Why or why not?
Answer:
No
Why not:
The midpoint of range is 3000. Yes, in from 1950-1955 there was a massive increase of the population of chipmunks but from then on it slowly decreased until 1990. In 1995, the population doubled from 1990. If you double 1440, you will get 2880. The biologist said between 2900-3100, using the midpoint of this range (3000) it is too low therefore being a bit unreasonable.
Hoped it is correct and helped you!
If you took a sample of magnetotactic bacteria from the northern hemisphere to the southern hemisphere, would you expect them to survive
Answer:
Yes.
Explanation:
Yes, magnetotactic bacteria can survive in the southern hemisphere if the suitable environment is available for them. These bacteria requires freshwater and marine habitats and prefer environments that contain little to no oxygen means anaerobic conditions. This type of environment is also present in the southern hemisphere so we can conclude that this bacteria can survive in that environment.
who do study edexcell certificate level? and can help be physics,chemistry and biology exam
I have done GCSE sciences and also applied science a level so I could probably help you :)
Name ten infrasonic animals.
what is the meaning of bio
Answer:
A biography, or simply bio, is a detailed description of a person's life. It involves more than just the basic facts like education, work, relationships, and death; it portrays a person's experience of these life events. ... Works in diverse media, from literature to film, form the genre known as biography.
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