The kingdom, protista, includes a) most viral agents. b) prokaryotic organisms. c) yeasts and bread molds. eliminate d) most single-celled eukaryotes.

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

Earthquakes a.created the rock in arches utah b.can be caused by volcanic eruptions c.are caused by tsunami waves d.wear mountains down into hills