A) has predictive power for similar phenomena that haven't been observed yet.
B) ties together many existing observations.
C) has more supportive research evidence than a hypothesis.
D) is broader in scope than a hypothesis.
E) All of the answer choices are correct.

A) Energy is needed to build, regulate and conduct processes of life.
B) Organisms are composed of the same elements as the rest of Earth's systems.
C) No changes in organisms will happen without reproduction of new generations.
D) If there is any variation in the environment, organisms must adapt to preserve their homeostasis.

A) population - ecosystem - community - biosphere
B) community - population - ecosystem - biosphere
C) population - community - ecosystem - biosphere
D) community - population - biosphere - ecosystem
E) ecosystem - population - biosphere - community