What is the difference between a bull shark and a megalodon?

Which is an example of a population?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

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