During which section of the geologic time scale did the first modern human evolve?

a. during the paleogene period of the cenozoic era
b. during the quaternary period of the cenozoic era
c. during the cretaceous period of the mesozoic era
d. during precambrian time

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

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.

Which of the following statements is true of cells