A coin is flipped 100 times, with a result of 53 heads and 47 tails. The deviation between the observed numbers and the expected 50-50 results is called _________
A. Probability
B. Degrees of freedom
C. Goodness of fit
D. Random sampling error
E. Standard error
D
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The most precise prenatal diagnosis for detecting chromosomal abnormalities is __________. Fill in the blank(s) with the appropriate word(s)
DNA replication is considered to be ________ because the end product consists of one old strand and one newly synthesized strand.
A. stringent B. relaxed C. dispersive D. semiconservative E. conservative
Which of the following events occurs to a territory-holding male zebra finch when he hears the song of
the male zebra finch that holds the neighboring territory?
a. Cells in the nucleus of his forebrain fire frequently. b. The territory-holding male flies out to drive off the neighboring male. c. Cells in the nucleus of his forebrain do not respond to the song of the neighboring male. d. Testosterone levels in his blood rise measurably. e. The territory-holding male initiates a ritualized threat display that may culminate in an expansion of his territory into the neighbor's land.
In a flowering plant life cycle, which of the
following structures are diploid?
a. megaspores b. male gametophytes c. eggs d. sporophytes e. none of these structures are diploid