1. what is the difference between a specific and a nonspecific defense?

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things

What is the difference between a meteoroid and a meteor?

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.