A virus's ability to infect an animal cell depends primarily upon the "<span>presence of receptor sites on the cell membrane"
Hope this helps!</span>
Answer: true
Explanation:they blow west to east
Hope this helps
In many different places to find them. Like pancreas, ovaries, testes, thyroid, parathyroid, hypothalamus, and neuro-endocrine organs.<span>
</span><span>
</span>
D. Number of protons in an atom's nucleus
