Is mashing something a chemical change

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

If a checkpoint detects damaged dna, the checkpoint may

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.