Rearrange the events into chronological order. Place the first event to occur at the top and the last event to occur at the bottom. Gases from Earth's surface for atmosphere Earth's surface cools. Photosynthetic organisms absorb atmospheric carbon dioxide and release oxygen. Organisms with aerobic metabolism evolve. The composition of Earth's atmosphere changes .

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

If a baby girl guinea pig looks almost identical to its mother, does this then mean that it inherited more alleles from its mother? explain. (hint: think about the vocabulary words dominant and recessive.)