About 500 million years ago, trilobites such as this were common that once covered much of indiana. violent storms often occurred in the same area and the trilobites were covered quickly by sediment, hidden for hundreds of millions of years.

a. along riverbanks
b. in the sandy plains
c. in warm, shallow seas
d. throughout the mountains

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a.the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.