Photosynthesis also requires energy and the green substance called

Environmental differences within ecosystems are generally caused by

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

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.