PLEASE HELP ME !! Which statement about organisms in the fossil record is correct?

Organisms show a steady decrease in diversity, interrupted by extinction events.

Organisms show an increase in diversity only right after an extinction event.

Organisms show a steady increase in diversity, interrupted by extinction events.

Organisms show a decrease in diversity only right before an extinction event.

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

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.

9. the history of life on earth is recorded in