Ascientist who studies macroevolution would probably
investigate the common ancestor of zebras and horses
develop a new flu vaccine
research the similarities in the species canis lupus
research reasons why species change over long periods of time

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.