The crust’s role in allows it to provide the raw materials necessary for life on earth.
a.
the rock cycle
b.
biogeochemical cycles
c.
fossil fuel discovery
d.
the water cycle

Which are reasons cells undergo cell division?

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz

Which statement describes the punctuated equilibrium theory?