What is the primary function of the hormone ADH?
A. regulates biological rhythms
B. mediates adaptation to long term stress
C. stimulates bone breakdown
D. conserves water by stimulating its reabsorption from urine
E. inhibits loss of calcium from bone
D. conserves water by stimulating its reabsorption from urine
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Which of the following statements DOES NOT characterize decomposers?
A. They feed on nonliving organic matter. B. They are saprobes. C. They break down wastes. D. They release nutrients that other organisms can use. E. They contain endosymbionts.
A male zebra finch can discriminate between the songs of strangers and the songs of established neighbors on adjacent
territories through a cluster of neurons in the ____.
a. cerebellum b. brainstem c. midbrain d. forebrain e. hindbrain
Sympatric speciation often occurs in animals through polyploidy
Indicate whether the statement is true or false.
What is considered to be the average natural mutation rate that occurs during DNA replication?
a. One in every million nucleotides replicated. b. One in every trillion nucleotides replicated. c. One in every billion nucleotides replicated. d. One in every ten thousand nucleotides replicated.