How are the diverse living organisms within a biome dependent upon each other and the nonliving parts of their environment? Give specific examples.

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Which level of taxonomy has the fewest organisms?