How might schwann's observations about embryos have affected the theory of spontaneous generation?

What are two ways in which waves erode the land?

The production of cells during mitosis into specialized function is recombination or differentiation

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