Where does most of the oxygen in the atmosphere come from?

A.

the process of evolution

B.

the process of photosynthesis

C.

the process of respiration

D.

the process of cellular respiration

Which of the following terms is regarded as the hardware which tells our cells what to do? A. allotype B. monotype C. genotype D. phenotype

Approximately 40 of fatal highway crashes are alcohol-related. a. true b. false

The part of the neuron whose name literally means "branch" is a (n)

Think about the sources you would use to get information about scientific ideas. Which sources would you avoid? Check all that apply. a magazine an encyclopedia a scientific journal an advertisement a TV show

Which of the following is not an agricultural technique?

What are some examples of a chemical reaction?

If you continue to increase the intensity of light that a plant receives, what happens? A. The rate of photosynthesis increases indefinitely with light intensity. B. The rate of photosynthesis decreases indefinitely with light intensity. C.

Three structural changes that occur in young unmodified plant cells as they develop into xylem tissues

Which of the following statements about Polymerase Chain Reactions is wrong? (A) DNA is briefly heated to break the hydrogen bonds holding two strands together.

Richard is driving forward and suddenly breaks. Describe what happens to his body according to Newton's Laws.