A rainforest is an example of a(n) A)Ecosystem
B)Molecule
C) Organ system
D) Population

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

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart