Growing arctic ice sheets is an example of-
a. correlational effect.
b. positive feedback.
c. negative feedback.
d. causal effect.

What feature of cell theory is best demonstrated in the image

Which image shows labeled organelles that are present only in plant cells?

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.