Which is the definition of an amino acid? a fatty acid that has no double bonds between carbon atoms
a protein building block
a type of carbohydrate that is difficult for humans to digest
a simple sugar that is the body's basic fuel

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.