Which statement is true of all living things?
a. they have two parents.
b. they are exact copies of their parents.
c. the young look like small adults.
d. they come from other living things.

Which type of respiration takes place when there is no oxygen present

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?