Which molecule stimulates phosphofructokinase to increase the flow of intermediates through glycolysis?
a. NADH
b. FADH2
c. ATP
d. AMP
e. acetyl CoA
ANSWER: d
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Which of the following discoveries would
NOT have called into question the idea that species didn’t change and/or are unrelated?
a. fossils of whales with legs b. dandelions are asexual plants that produce non-functional pollen c. all humans are 99% genetically the same d. the DNA of humans and chimpanzees is 96-98% the same e. more than one of these
How a plant cell responds to a hormone depends on the
A) concentration of the hormone. B) "shelf life" of the hormone. C) presence of other plant cells nearby. D) cell that secretes the hormone. E) amount of available sunlight.
Martin keeps a worm bin in his basement because they need cooler temperatures to survive. He feeds them about 1 pound of kitchen scraps each week. One summer the temperatures rose above the optimal temperature for the red worms (~ 85°F) and many in his colony died. However, those that survive continued to reproduce and within 6 months his colony was again thriving. The next summer, unusually warm temperatures again cause the basement temperatures to rise above 85°F for 2 days in a row. Surprisingly, Martin noticed that only a small portion of the worm colony died. What is the best explanation for this?
What will be an ideal response?
The buildup of soil on bare rock by the decomposition of early colonizers is characteristic of ________ succession.
A. opportunistic B. secondary C. species-rich D. primary