Calcium and phosphate are important parts of the bone matrix because they: A provide flexibility to bone.

B promote the formation of cartilage.

C provide strength and durability to bone.

D produce blood cells in the bone marrow.

20 the main source of energy for our planet comes from the

An organism's reproductive strategy includes all of the following except a. the number of offspring produced. b. the amount of energy expended in producing offspring. c. the length of time parental care is given d. the number of alleles an organism passes on.

Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.