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ValentinkaMS [17]
3 years ago
5

Why is reproductive isolation required for speciation to occur?

Biology
1 answer:
Anarel [89]3 years ago
4 0

Answer:

a

Explanation:

If populations can interbreed, they are considered one species.

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Which cytoskeletal element interacts with myosin to produce contractile force in muscle cells?
Radda [10]
The answer to this question would be: microfilament

Microfilament or actin filament is the organ where myosin binding in muscle cells. This bind is making the tensile strength of the muscle. When muscle contract, the myosin will move to the actin at the outer side, makes the muscle length become shorter.
3 0
3 years ago
During a presentation about evolution a student claims that modern giraffes inherited their long necks from ancestral giraffes t
motikmotik
"Stretching the neck enabled giraffes to reach higher, which gives them an advantage to survive, reproduce, and pass on this trait" is the one sentence among all the choices given in the question that best describes the claim. The correct option among all the options that are given in the question is the second option or option "B".
6 0
3 years ago
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Pigmented eyes (P) are dominant to non-pigmented (p), and dimpled chins (D) are dominant to Non-dimpled chins (d). A pigment-eye
Ivenika [448]

Answer:

PpDD and PpDd

Explanation:

Pigmented eyes (P) are dominant to non-pigmented (p), and dimpled chins (D) are dominant to Non-dimpled chins (d).

The <u>possible genotypes of a pigment-eyed, dimple-chinned person</u> would be  PPDD, PpDd, PPDd, PpDD while a blue-eyed person without a dimpled chin would have the genotype ppdd.

The genotype of a blue-eyed, dimpled chin child would be either of ppDd or ppDD, but in this case, the mother is ppdd and as such, the child cannot have two copies of D allele. Hence, the genotype of the child can only be ppDd.

In order for the child to have blue eyes (pp), it means that the father has to have the non-pigmented allele (p). This also means that the father is heterozygous for eye pigmentation (Pp).

<em>Hence, the genotype of the father is now limited to </em><em>PpDD</em> <em>and </em><em>PpDd</em>.

8 0
2 years ago
C cells of the thyroid gland secrete __________. C cells of the thyroid gland secrete __________. tetraiodothyronine cortisol ca
Leni [432]

C cells of the thyroid gland secrete calcitonin.

<h3>What does C cells of thyroid gland produce?</h3>
  • The thyroid follicle, which is the gland's active component, is encircled by a single layer of epithelial cells, and the lumen is stuffed with colloidal material.
  • It includes parafollicular cells, or C cells, which release calcitonin.
  • The C-cells of the thyroid gland secrete calcitonin, a 32 amino acid hormone.
  • When the concentration of blood calcium has grown over the usual range, the thyroid gland releases the hormone calcitonin, which lowers the level.
  • The parafollicular cells, sometimes referred to as the C cells, of the thyroid gland are the principal producers of this polypeptide hormone, which has 32 amino acids.

Learn more about thyroid gland here:

brainly.com/question/27523862

#SPJ4

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: The C cells of the thyroid gland secrete

a) TSH.

b) parathormone.

c) thyroxine.

d) triiodothyronine.

e) calcitonin

6 0
1 year ago
Although it has a greater ____ than Sirius, Rigel does NOT look as bright in the night sky.
nignag [31]
I can tell you that it is NOT B.
 I got it wrong.
8 0
3 years ago
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