What type of passive transport uses the assistance of proteins to molecules pass through the plasma membrane?

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

How does the nervous system affect the excretory system?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots