How many independent variables can be tested in a controlled experiment? a. one b. two c. three d. as many as you want

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

The first generation of offspring from the cross of two parents is called the a.f1 generation b.f2 generation c.short generation d.p generation