Can both types of autotrophy occur in prokaryotes and eukaryotes?

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

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