What is the role of the lacz gene product, the enzyme ß-galactosidase?

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

The cluster of developing cells from conception until birth is called an

Match each symbol with its description.