Which of these is a major trend in land plant evolution?
A) the trend toward smaller size
B) the trend toward a gametophyte-dominated life cycle
C) the trend toward a sporophyte-dominated life cycle
D) the trend toward larger gametophytes
C
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The env gene of the HIV genome encodes:
A. reverse transcriptase. B. integrase. C. capsid. D. matrix. E. surface glycoprotein.
True-breeding, purple-flowered pea plants were crossed with true-breeding, white-flowered pea plants. The F1 progeny all had purple flowers. If the F1 offspring are self-fertilized, what progeny phenotypes would be expected?
A. 1 purple : 2 pink : 1 white B. 3 white : 1 purple C. 3 purple : 1 white D. all purple E. all white
A strain of E. coli is trp? his? lac?. Which medium would this bacterium grow on?
A) minimal medium with lactose as the sugar, supplemented with histidine and tryptophan B) minimal medium with glucose as the sugar, supplemented with histidine and tryptophan C) minimal medium with glucose and lactose as the sugar D) minimal medium with glucose as the sugar
Objects that are not actively moving but have the capacity to do so are said to possess:
A. entropy B. kinetic energy C. potential energy D. sound energy