How many atoms of the element hydrogen are there for each atom of oxygen in the compound we know of as 'water'? a. 8
b. 4
c. 1
d. 2

How do plants obtain more sunlight a.) they lean towards the light b.)they grow straight up c.) they only live in sunny areas, like the tropics d.) they stay low to the ground

The diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which stage in the cycle the hormone levels are at their highest and most active.

Autonomous underwater explorers will be used to gather large-scale ocean information select the best answer from the choices provided ot