Approximately how long do scientists think chemical evolution took?

What type of cell is produced after fertilization occurs and the gametes combines ?

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.

Accuracy is a measure of how consistently a result is determined by repeated evaluations a. true its true b. false