The answer is D. Hope this helps!
Because hormones secreted by endocrine glands regulate the activity of body cells ..the release of body hormones into the blood is controlled by a stimulus either causes an increase or a decrease in the amount of hormone secreted .
Answer:
1. Aortic arch
2. Left subclavian artery
3. Left axillary artery
4. Left brachial artery
5. Left radial artery
Explanation:
The answer above is according to Quizlet
Body parts of unrelated organisms that serve the same function are examples of convergent evolution.
<span>Convergent evolution is the phenomenon when the different species independently create similar features. Those features can be structures that have similar form or function. This happens because organisms have been adapted to similar environments or ecological niches.</span>
I think what they rely on is there experiment and how they do it