Which enzyme do scientists use to cut genes out of strands of dna?

Select the correct answer from each drop-down menu proteins are

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

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.