When managers try to analyze a problem or opportunity, identify different courses of action, and select and implement what they perceive to be the optimum course of action, they are using skills.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.

It's either -limiting factors or -scarce resources but i'd go with my first answer since the food and water are abundant they really aren't scarce

Electrons are transferred to ferredoxin.