What does sampling error refer to?
A) the difficulty in accurately measuring results that are incalculable
B) the differences between a group of experimental subjects and the population as a whole
C) the experimental results that do not support the hypothesis being tested
D) the intentional biases on the part of researchers
B
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Which of the following vertebrates has a social structure most closely resembling social insects?
a. the phalarope b. lions c. the naked mole rats d. Siberian tigers e. chimpanzees
Convert 0.539 g to mg.
A.5390 B. 53.90 C. 539 D. 5.39
What is the key difference between photoheterotrophs and photoautotrophs?
a. Photoautotrophs only use bacteriochlorophyll; photoheterotrophs only use chlorophyll a. b. Photoheterotrophs produce oxygen as a by-product; photoautotrophs do not. c. Photoheterotrophs use hydrogen sulfide for reducing power; photoautotrophs do not. d. Photoheterotrophs use organic compounds as their carbon source; photoautotrophs use carbon dioxide as their carbon source.
After several years of drought, the beak sizes of the medium ground finches were on average, larger than they had been in previous generations. What kind of natural selection occurred?
a) sexual b) disruptive c) balancing d) directional