Which eras ended with a mass extinction?

O A. Paleozoic and Precambrian

O B. Mesozoic and Paleozoic

OC. Mesozoic and Cenozoic

O D. Cenozoic and Paleozoic

Kori's doctor says her muscular strength and endurance are excellent, but he worries about kori's cardiovascular health. kori enjoys weightlifting, softball, basketball, and bowling.

To support his hypothesis of continental drift, Alfred Wegener did NOT use

Viruses are considered to be nonliving. how are viruses similar to living organisms? how are they different?

8 Evaluate If the mother swan pushes a third baby swan in front of her, is work being done on the third baby? Explain your answer.

Pead this passage (1) For them, this government has no just powers derived from the consent of the governed 2 For them this government is not a democracy, it is not a republic 3) it is the most odious aristocracy ever established on the face of the

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.