Which product of respiration is considered waste material and leaves the alveoli?

A) oxygen

B) water

C) carbon dioxide

D) carbon monoxide

This is the unequal distribution of ions across a cell membrane.

Most people drive cars in heat their homes with petroleum, call, or natural gas. Why is it important to find alternatives for these sources of energy? What are three examples of alternatives?

Certain corals have been found in extremely deep water. These coral lack the zooxanthellae that are found in tropical coral reefs because zooxanthellae require sunlight to go through photosynthesis and there is no sunlight available at these depths.

Prolactin is a hormone that:

The Father is Blood Type O, the Mother is Blood type AB What are the percentages of Blood types in the offspring?

What time of the year do animals in the rain forest reproduce

Which is NOT true about ocean waves?

Which of the following is true about a suspension?

Methane hydrates in the ocean are a significant source of methane

Describe what makes up the universe.