When seeds germinate, roots grow downward and stems grow upward in response to gravity. this response to gravity is called

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.

Ican construct an argument based on data about the risk and benefits of renewable and nonrenewable energy sources