Which of the following secretes a hormone that

causes its own secretory cells to respond?
a. small intestine
b. pancreas
c. large intestine
d. stomach
e. liver


Answer: d

Biology & Microbiology

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Which of the following is the best definition of

sympatric speciation? a. species that evolve due to geographical distance b. mechanical isolation acts to prevent speciation c. breeding behavior that prevents the organisms from breeding due to differences in their breeding time d. ecological isolation e. evolutionary change that creates two species occupying the same space

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The form of natural selection that leads to an increase in the frequency of alleles which promote the fitness of genetic relatives is called ________

A) direct selection B) indirect selection C) inclusive selection D) kin selection

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In the years after the completion of the human genome project, genome sequencing revealed surprisingly little amount

of variation in the sequence and arrangement of nucleotides in humans. a. True b. False

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You start to trip, but you keep your balance and don't fall. Which of the following brain regions is responsible for the rapid coordination of muscle activity that kept you from falling?

A) cerebral cortex B) thalamus C) cerebellum D) cerebrum

Biology & Microbiology