1) what is one source for the variation that drives natural selection?
a.
mutation
c.
over production
b.
cloning
d.
population shifts

2)the gradual change in a species over time is called
a.
mutation.
b.
evolution.
c.
migration.
d.
variation.

3)darwin concluded that organisms on the galápagos islands
a.
had changed over time.
b.
had remained the same.
c.
were the result of selective breeding.
d.
had no variations

b. the carbon cycle ensures living things have a source of hydrogen

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics