All cells have

an outer membrane or plasma membrane
cytoplasm
a cell wall
a nucleus
protoplasm
large vacuoles
chloroplasts

How had the study of mitosis affected scientists knowledge of cancer

Competition occurs between species when

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.