How many different codons are possible with the four different nucleotides?
A. 55
B. 128
C. 64
D. 12
E. 24
Answer: C
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The effects of allometric growth on head morphology in the human and chimpanzee
A. The human and chimp fetal skull are exactly the same, the human jaw development slows down after adulthood.
B. Heterochrony is occurring, the chimp jaws continue to develop at a faster rate than human jaws.
C. Paedomorphosis is occurring, the human jaw retains its small size while the chimp jaw continues to grow even in adulthood.
D. The nasal passages of the chimp are shortened due to reduced growth during fetal development while the nasal passages of the human grow through adulthood.
E. All of the choices are correct.
A(n) ________ is an instrument used to separate subcellular structures and macromolecules on the basis of size, shape, and density. ________ developed this instrument in Sweden during the period 1925–1930
Fill in the blank with correct word.
Whether a microtubule shrinks or grows is determined by
a. the rate of GTP-bound tubulin addition relative to the rate of tubulin GTP hydrolysis. b. the phosphorylation state of ?-tubulin. c. the rate of ATP hydrolysis relative to the rate of ATP-bound tubulin addition. d. the presence or absence of ?-tubulin.
Which object is most like a hydrostatic skeleton?
A) a water balloon B) a hot-air balloon C) a piece of M&M candy D) a bowling ball