Just need the letter only answer if you know 100% they are right : )

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.

Adescription of a type of bio biotechnology (genetic engineering, cloning, or artificial section) one benefit or one risk for the individual (based on whether you are for or against it) one benefit or one risk for society (based on whether you are for or against it) one benefit or one risk for the environment (based on whether you are for or against it)