Answer:
B.
Explanation:
I think it's because protons are the ones that circle, neutrons stay in the middle becuz they're neutral, and electron are negatively charged?
In exothermic rxn heat is evolved
in endothermic rxn heat is consumed
False! The endocrine system carries out its job by releasing hormones which then travel through the blood stream to target cells where they interact and create a hormonal change in those cells. the main organs of the endocrine system are the pituitary gland, the hypothalamus, and the thyroid.
Answer:
<h3>The genes that caused scales to become feathers in the early ancestors of birds </h3>