On a microscope, the _ is the white circle seen while looking through the scope

Use the drop-down menu to complete the statement. an electron in the first energy level of the electron cloud has an electron in the third energy level.a. a lower energy thanb. a higher energy thanc. the same energy as

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?

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade