The air you breathe into your lungs on a daily basis mostly consists of

a. oxygen

b. carbon dioxide

c. nitrogen

d. hydrogen

What happens in ribosomes?

Why is this the dependent variable

Why do meteorologists use computer models? To change the density of air. To increase the humidity in air. To reduce the atmospheric pressure. To predict extreme weather conditions.

Formulate a research question that could be posed by researchers while studying and attempting to remediate Brown Marsh?

If we know the relative age of a fossil, we also know

Suppose you use a microscope to look at a cell from the leaf of a tree. What structure will you see that would not be found in a cell from your fingernail? A. mitochondria B. cilia C. cell wall D. ribosomes

Name the three energy roles that organisms fill in an ecosystem.

Adrenergic postganglionic neurons release the hormones norepinephrine and epinephrine. Adrenergic postganglionic neurons release the hormones norepinephrine and epinephrine. True False

Which of the following are examples of the first specialized tissues?

Which structure of the trachea prevents it from collapsing inward and obstructing the air passageway?