Homeotherms
A. have the same body temperature as their environment.
B. maintain a cold body temperature.
C. maintain a constant body temperature.
D. are always unicellular organisms.
C. maintain a constant body temperature.
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The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called ________.
A. fats B. phospholipids C. proteins D. carbohydrates
During the __________ epoch, the mammals experienced an explosive adaptive radiation
a. Holocene b. Paleocene c. Pleistocene d. Eocene e. Pliocene
Which of the following statements about the energy yield of aerobic respiration is false?
A) Glycolysis resulting from 1 glucose molecule yields 2 ATP molecules. B) The oxidation of pyruvate results in the production of 0 ATP molecules. C) Oxidative phosphorylation resulting from 1 glucose molecule yields 12 ATP molecules. D) The citric acid cycle resulting from 1 glucose molecules yields 2 ATP molecules.
Bryophytes were the dominant plants in the first 100 million years of plant evolution. By the Carboniferous period, seedless vascular plants formed giant forests. Why were these plants able to outcompete bryophytes?
a. Their vascular tissue allowed them to grow tall, competing for light and more widely dispersing their spores. b. Their protected embryos were better able to withstand dry conditions, providing a selective advantage in dominating terrestrial habitats. c. They did not require water for their sperm to swim to fertilize the eggs, allowing them to colonize dry habitats. d. They were diploid, so they could grow faster and taller than haploid bryophytes. e. They had megaspores and microspores. This extra genetic variation enabled natural selection to favor taller growth.