If you plot mean annual precipitation against mean annual temperature and look at the distribution of major biomes relative to these two variables, which biome would be in the central region of the graph?
A. temperate deciduous forest
B. hot desert
C. taiga
D. tropical rain forest
E. savanna
Answer: A
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Typically ________ of ORFs in a genome cannot clearly be assigned a function. These ORFs are usually assigned and predicted to encode hypothetical proteins
A) < 1 % B) 5 % C) 30 % D) 90 %
Which of the following statements regarding vaccines as disease preventatives is incorrect?
A. There is currently no smallpox vaccine available to the general public. B. Immunization is currently not possible against Clostridium perfringens. C. Zostavax is recommended for older adults to prevent shingles. D. The Carter Center has promoted the development of a vaccine against river blindness.
How is glucose involved in catabolite repression of the lac operon?
A) Glucose causes cAMP levels to increase, which leads to increased CRP binding and the lac operon is activated even when lactose is present. B) Glucose causes cAMP levels to decrease, which leads to decreased CRP binding and the lac operon is repressed even when lactose is present. C) Glucose is also a substrate for ?-galactosidase and thus competes with lactose for this enzyme. D) Glucose activates transcription of the lacI gene to increase the amount of Lac repressor in the cell.
When a rabbit eats the lettuce in your garden, the rabbit uses all of the energy in the lettuce
Indicate whether the statement is true or false