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In his experiment on spontaneous generation, Louis Pasteur changed only one thing between his experimental groups: whether or not the neck of the flask was broken. That means that his experiment was .

A. controlled

B. randomized

C. testing a hypothesis

D. answering a well-defined question

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a. the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation. c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation. d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

How does a lytic infection differ from a lysogenic infection?