Which of these is not a difference between plant and animal cells? plant cells have a rigid cell wall outside the plasma membrane. plant cells lack vacuoles. animal cells have no chloroplasts. animal cells have only a plasma membrane surrounding the cell?

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.