Select the correct answer.
which type of rock is formed from cooling molten rock?
a.
igneous
b.
magma
c.
metamorphic
d.
sedimentary

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

What causes the phospholipids to organize themselves the way they do

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight