Muscles make up more than of a person's body mass.
a. 10%
b. 25%
c. 40%
d. 75%

Which u.s. state is home to the fewest species of mosquitoes?

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Minor illnesses: a.) decrease the risk of sids b.) increase the risk of sids c.) increase the risk of hospitalization d.) decrease the risk of allergies e.) increase the risk of allergies