The earliest hominin that belonged to the same genus as modern humans was probably a. homo ergaster. b. australopithecus afarensis. c. homo habilis. d. homo neanderthalensis.

The normal shape of an enzyme is as shown in structure a. if the enzyme’s shape changes to that shown in structure b, what are two consequences of this change?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

Match each medication with its description.