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DerKrebs [107]
3 years ago
14

why is it said that natural selection acts on phenotypes rather than on the genetic material of an organism?

Biology
1 answer:
Phantasy [73]3 years ago
4 0

It is said because it doesn't change the genetic material, but the outside of the animal when the species slowly adapts to it's surroundings and predators.

Example: A group of 10 birds are in a forest. One of the birds has a short, stubby beak, and another 3 have long, thin ones. The rest of them are normal. If the only food left after a natural disaster was flower nectar, then the 3 with the long, thin beaks would survive, and the other birds, poorly adapted for this outcome, would not live.

It doesn't actually change the genetic makeup of an organism but may slowly alter it's entire gene pool over time.

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What process is depicted in the basal layer of the glandular epithelium shown in b?
Snowcat [4.5K]

Answer;

-Cell division

Explanation;

-Glandular epithelium forms the covering of all major glands. It is also present in the intestinal lining.

-Cells are regenerated by division in the basal layer and migrate toward the apical surface to replace cells lost by fragmentation. Cell division is indicated by the mitotic phase cells located in the deepest (basal) layer of the glandular epithelium.

5 0
3 years ago
 What chromosome is a sex-linked trait located on?
Gelneren [198K]

Answer:

Sex linked is a trait in which a gene is located on a sex chromosome. In humans, the term generally refers to traits that are influenced by genes on the X chromosome. This is because the X chromosome is large and contains many more genes than the smaller Y chromosome.

8 0
2 years ago
Could someone please help me answer this Biology question. ASAP!☺
s344n2d4d5 [400]
The effects could be, the top consumers may run out of food, which would make it harder for them to catch food
7 0
3 years ago
A strand of DNA has the bases AGTAAC. Using letters, show the matching DNA strand.
kkurt [141]
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Always remember that A pairs with T, G pairs with C, T obviously pairs with A, and C obviously with G.
5 0
3 years ago
In the following table, label each statement as true (T) or false (F). If the statement is false, rewrite it so that it is true.
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1) False. Scientists may predict something but realize a difference soon after before the test, so they could definitely change the hypothesis if they want. It’s only AFTER the experiment they cannot. Because a hypothesis is like a “guess” as to what’s going to happen, right?

2) False. A hypothesis can’t be “valid” because it’s literally a prediction.

3) True. Especially if you’re doing a chemistry lab, it’s really important things are done in order or else the product might result as something else you were expecting, or can be very dANGEROUS

4) True. The conclusion must be based on data because it’s the observation that was seen.

Hope this helps!! I could have answered in short form but I just wanted to make them understandable:)
7 0
3 years ago
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