State two cations in the extracellular and two cations in the intracellular.

Classify the structures as homologous or analogous, depending on their structure and function.

How does the study of genetic disorders such as pku biologists understand normal alleles?

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