During metaphase of mitosis, how many telomeres are present in a cell in which 2n = 12?
A) 6
B) 12
C) 24
D) 48
E) 1200
D) 48
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A(n) ____________________ is the group to which experimental results can be compared. Fill in the blank(s) with the appropriate word(s)
Which of the following is NOT one of the three steps (processes) involved in urine formation?
A. glomerular filtration B. tubular reabsorption C. countercurrent mechanism D. tubular secretion
Among other bones, the axial skeleton includes the ________.
a) thoracic cage and vertebral column b) thoracic cage and pectoral girdle c) skull and pelvic girdle d) pectoral and pelvic girdles
Some of your DNA may not code for any protein and has no known function in gene regulation; it is sometimes referred to as noncoding DNA. How do nucleotide sequences of "noncoding DNA" evolve?
A) They evolve through natural selection. B) They evolve through genetic drift and other chance processes. C) They evolve to be more useful by taking on new functions. D) They evolve by gradually being eliminated from the gene pool.