What kind of rock was deposited first?
a. Sandstone
b. Conglomerate
c. Limestone
d. Shale.

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

Are salt and soap nutrients or toxins for yeast? explain.

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation