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Rom4ik [11]
3 years ago
12

Provide a summary of biologist Stephen Stearns’ findings in how Natural Selection may be working today in humans.

Biology
1 answer:
polet [3.4K]3 years ago
4 0

Answer:

Stephen Stearns states that natural selection doesn't mean the survival of the fittest organisms, but rather this mechanism is illustrated by the selective reproduction of the fittest. Natural selection can be classified into distinct types, including directional, disruptive and stabilizing selection, which are in turn based on sexual selection. These types of selection are driven by different outcomes that have different dynamics.

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All the following rely on ATP as a source of energy except
JulsSmile [24]

Answer:

b. diffusion and osmosis across semi-permeable membranes

Explanation:

ATP (adenosine triphosphate) is a high energy carrying molecule in the system of living organisms. It posseses the ability to store and release energy for use by organisms during biochemical activities. However, some processes do not require ATP to occur and are called PASSIVE TRANSPORT while those that require energy (ATP) are called ACTIVE TRANSPORT.

In the above options, the processes listed as follows require ATP to occur:

- The active transport of glucose from the small intestine to the blood

- The movement of the flagella of sperm for motility

- Exocytosis of waste substances across a semi-permeable membrane

However, the diffusion and osmosis across semi-permeable membranes, which is a passive transport does not require ATP.

7 0
3 years ago
In the future, doctors may be able to evaluate your DNA to check for genetic markers related to specific medical conditions or h
puteri [66]
First things first, I'd call this a questionnaire rather than a problem but anyways. Your DNA profile is literally your identity, and to have that stored in the medical records would be useful in some other cases besides medical issues. It is like having a copy of your fingerprint in the government's hands. Thus one may find it useful as another way to identify someone when the need occurs. As for purposes such as to be referred for the development of personal medical treatment (I believe you're referring to project CRISPR) , is not as necessary because the way they identify mutated genes or "infected" DNA or cells is by referring it to the normal DNA found in any other cells in your body, and if cells are that easy to access, they do not have the need to keep a medical record just for your DNA sequence along with all your gene codes, especially when you are performing investigations on the same species, humans, who have the same number of chromosomes with the similar genes.
7 0
3 years ago
What basic life processes must all unicellular organisms perform in order to survive
n200080 [17]
This answer could be cellular respiration. It makes energy so they can live (in basic terms) haha
3 0
3 years ago
The skin layer just beneath the stratum basale is the __________ layer.
Lubov Fominskaja [6]
<span>The skin layer just beneath the stratum basale is the </span>stratum<span> corneum of the epidermis.</span>
6 0
3 years ago
When heterotrophs consume food (organic compounds), they convert it to usable chemical energy, primarily in the form of _______,
luda_lava [24]

Answer:

The correct answer is - ATP , glycolysis.

Explanation:

Heterotrophs are the organism, depends on other organisms for their food and energy. They get their energy when they take their food (glucose or other organic compound).

This organic compound is convert into the chemical energy or energy currency primarily, ATP during the process of glycolysis, the first stage or cycle of cellular respiration.

Thus, the correct answer is : ATP, glycolysis.

8 0
3 years ago
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