Photosynthesis is important to living organisms because it is

the foundation of most food chains.

the source of nitrogen gas in the air.

how animals get carbon dioxide to breathe.

the process that occurs in most ecosystems.

Which of the following does not affect the final outcome of gene expression? A. The environment of the cell B. The presence of other cells C. The timing of gene expression D. The number of amino acids in proteins being produced

Pinocytosis is an example of A. osmosis. B. simple diffusion. C. active transport. D. facilitated diffusion.

What unit of measure is used to find both length and height

What is septicemia? How does this disease happen?

Which group of organisms is always found at the base of a food chain or food web?

What is the only reasonable and ethical way to achieve zero population growth? A increase the birth rate B decrease the birth rate C increase the death rate D decrease the death rate

Consider the cell cycle; which stage takes pretty much the same amount of time regardless of cell type? Explain

A 45 year-old male who is in good health presents with complaints of pain in his left heel. He states that the first few steps out of bed in the morning are extremely painful. He has no history of trauma. What is the likely etiology of his pain? A.

How can your weight vary but your mass can remain the same?

Which of these is NOT an aquatic reptile group? plesiosaurs pterosaurs ichthyosaurs nothosaurs