Answer:
A. It allows two populations to evolve separately.
Explanation:
Geographic isolation is theorized to have catalyzed the formation of new species. Let’s say groups A and B of a bird species get separated by something, and they can’t cross between to interbreed or exchange alleles.
We describe this as no gene flow, which is the opposite of choices C and D. Because of this, they may diverge if given enough time due to the difference in environmental pressures, because they’re now in different environments.
B is incorrect because it doesn’t apply.
Answer:
Symbiotic relationship
Explanation:
The relationship between the manta ray and the sturgeon fish is a symbiotic relationship. It is also known as mutualism. It involves two organisms benefiting from each other. The two creatures gain something from each other.
The manta ray is cleansed of the dead skin cells and parasites by the sturgeon fish while Sturgeon fish gains a food source from the the manta ray.
As far as I know, radioactive dating is the measure of radioactive substances in a fossil or something. Like the fossils have a radioactive substance in them, it is the only thing that can show how long the fossils been aging, therefore being able to show the date. And thats how radioactive dating works, and that is how a paleontologist uses it
Hey there,
Your question states: Explain why it makes sense that the levels of estrogen and progesterone are low in the blood of a female during menstruation.I'm a guy, but I just happen know this information.The reason why the levels of estrogen and progesterone are low in the blood of a female during menstruation is to basically produce (FSH) or follicle stimulating hormone. We need to remember that menstruation is part of the menstrual cycle, which to would help a women/teen to handle/establish a well and healthy pregnancy, (if that makes sense). The average cycle would basically be i think about like 25-28 days. And one thing to remember is that when there is a <span>ripening egg,this causes estrogen levels to rise. This would be the reason why its low.
Hope this helps</span>
