Why are more and more people concerned about the increased use of fossil fuels, like gasoline used in cars?
a. fossil fuels may one day run out.
b. cars that run on gasoline are very expensive.
c. gasoline provides very little amounts of energy.
d. fossil fuels are all found deep within the earth’s crust.

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Moving down the ramp from 6 meters to

Animals that have thick fur and ae able to store large amounts of body fat live where ?