The diagram below shows illustrations of fossilized forefeet and molar teeth from horses that lived during different time periods. The diagram also shows how the body shape and size of horses has changed over time.

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

This group of organisms perform the process of ammonifcation. a. herbivores b. decomposers c. carnivores c. plants

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -