What will happen to the pH inside of a thylakoid that is exposed to light?
A. It will increase.
B. It will depend on the starting pH of the stroma.
C. It will depend on the starting pH in the thylakoid.
D. It will not change.
E. It will decrease.
E. It will decrease.
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The nitrogen-limitation hypothesis states that organisms select food in terms of the nitrogen content of the tissue. Why might this be true?
A. Because many consumers need large amounts of nitrogen; for example, animal tissue contains about 10 times as much nitrogen as plant tissue. B. Because most organisms are able to "fix" nitrogen more efficiently than plants. C. Because foods with lower nitrogen content are easier for consumers to digest, leading most organisms to seek out low nitrogen foods. D. Because high nitrogen levels are a key part of plant chemical defenses, resulting in organisms avoiding high nitrogen plants. E. Because plant tissues contain, on average, 10 times the level of nitrogen needed by most consumers.
Deserts are usually found at ____ north and south latitude
a. 5 degrees b. 15 degrees c. 30 degrees d. 60 degrees e. 90 degrees
Which of the following is not true about the autoclave?
A) Can be used to kill most bacteria B) Can be used with glassware and metal instruments C) Inactivates most viruses D) Can be used with heat-labile materials E) Can be used to kill most endospores
You are employed by the Natural History Museum of Chicago as a wildlife biologist. You recently completed an expedition to Indonesia where you discovered a new and very colorful species of beetle. Based on observations, you hypothesize that sexual selection may be playing a role in the evolution of this species. Which of the following observations would support your hypothesis?
A. Males defend territories. B. Female preference for larger, brighter males. C. Male beetles are bigger and more brightly colored than females. D. All of the above observations would support your hypothesis.