What toxic compounds can be found in bottled water? Where do they come from?

Which incident would result in primary succession instead of secondary succession?

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

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