Coactivators are:
A. necessary only for initiation of transcription of housekeeping genes.
B. factors that bind to other proteins, not to DNA directly.
C. factors that complex directly with RNA Pol II to form a preinitiation complex.
D. factors that bind to enhancers.
B
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The eggs of the A. lumbricoides worm are ingested and hatched in the duodenum, penetrate the intestinal wall, and migrate to the hepatic portal circulation. Its geographic distribution and in-fection rate are associated with:
a. institutional crowding. b. poor sanitation. c. day care centers. d. moist warm soil.
If the sunflowers represent 2400 calories, how many calories would be lost as heat as you
move from the first to the second trophic level?
a. 240 b. 2160 c. 90 d. 10
Flooding, landslides, soil nutrient loss, and global climate change all result from:
a. the introduction of exotic plants b. desertification c. deforestation d. ozone depletion e. biological magnification
True or false: You would expect similar species with a different number of chromosomes to be genetically compatible and therefore able to reproduce
A. true B. false