Which of the following is NOT key evidence for a large meteorite impact striking the Earth approximately 65 million years ago?
A) tiny particles of glass called microtektites
B) "shocked quartz" grains, with fine parallel planes caused by a burst of intense pressure
C) the disappearance of many taxa of large reptiles beginning about 70 million years ago
D) a worldwide layer of sediments highly enriched in the element iridium
E) gravity anomalies that allow us to map the now-buried meteorite crater
C
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The sum total of all chemical reactions occurring in a cell is called
A. metabolism. B. catabolism. C. anabolism. D. None of the choices are correct.
Which of the following is the major glycolytic pathway used by plants and animals?
A. Pentose phosphate pathway B. Entner-Doudoroff pathway C. Tricarboxylic acid cycle D. Embden-Meyerhof pathway
3-phosphoglycerate is to C3 plants as ________ is to C4 plants.
Fill in the blank(s) with the appropriate word(s).
Which of the following best represents a measure of ecological density?
A) number of frogs per meter of pond shoreline B) number of birds per hectare C) number of mammals per meter D) number of fish per volume of ocean