What statement about zygotes is correct?
a. zygotes have a full set of chromosomes, receiving half from each parent.
b. zygotes have twice the number of chromosomes as each of its parents.
c. zygotes have half the number of chromosomes, receiving only one set from a single parent.
d. none of the above

the answer is tropical areas. the tropical areas obtain more

radiant energy from the sun than they lose to space through terrestrial

radiation, and vice versa for polar areas. earth has an energy remaining in the

tropics and an energy scarcity for the polar areas.

explanation:

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.