The "emergency" part of the nervous system that prepares the body for "fight or flight" is the

How does natural selection change thephenotypes within a population over time?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

Wich organism obtains its energy from dead or decaying matter