Which structure exerts primary control over the concentration of sugar in the blood?

A) liver
B) pituitary
C) pineal
D) pancreas


D

Biology & Microbiology

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As rainfall in an African savanna decreases, it would most likely change into

A. tiaga. B. desert. C. tropical rainforest. D. temperate forest. E. tundra.

Biology & Microbiology

A set of cells in the intestinal epithelium divide continually to replace dead cells lost from the surface of the intestinal lining. If you examined this continually dividing population of intestinal epithelial cells under the microscope, most of the cells would

a. be in meiosis. b. be in mitosis. c. be in interphase. d. have condensed chromatin. e. Both b and d

Biology & Microbiology

Which of the following assumptions or observations is not part of Darwin's idea of natural selection?

A) Whether an organism survives and reproduces is almost entirely a matter of random chance. B) Heritable traits that promote successful reproduction should gradually become more common in a population. C) Populations produce more offspring than their environment can support. D) Organisms compete for limited resources.

Biology & Microbiology

At one end of a tRNA molecule is a sequence of 3 nucleotides called an anticodon that ____

a. signals the production of a ribosome b. signals the unwinding of the DNA coils c. initiates the movement of mRNA out of the cell nucleus and into the cytoplasm d. binds to its anti-complementary tRNA codon e. binds to its complementary mRNA codon

Biology & Microbiology