Any variation that can an organism survive in its environment is called a(n):

When analyzing tree rings, what do scientists assume a thin ring indicates?

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.