Which of the following is not a possible consequence of exposure to ozone?

Which image shows labeled organelles that are present only in plant cells?

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary

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.