PLEASE HELP!! If the sperm cell is unable to enter the egg cell when they meet, this is which of the following reproductive barriers? A. posy-zygotic isolation B. temporal isolation C. gametic isolation D. mechanical isolation​

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.

i think the answer would be d