Which of the following best illustrates bias in scientific investigations?
A) Investigations of the cause of AIDS are limited by our inability to see viruses.
B) Investigations of the health effects of smoking are funded and published by a tobacco company.
C) Researchers studying heron nests notice that some baby herons fall out of nests and are killed.
D) An experiment testing the effect of a new drug has only one control group.
B
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During the Mesozoic, climatic variation on Earth could be described as ____
A)extreme in terms of precipitation B)extreme in terms of temperature C)lacking great north-south variation D)having great north-south variation E)similar to the present day
All of the following are elements of rational choice theory EXCEPT:
a) interest, especially self-interest. b) sentiments. c) the quest for personal gain or advantage. d) a hidden agenda among rational actors.
What is an ecosystem? What is the spatial scale of an ecosystem? Provide some examples of an ecosystem
What will be an ideal response?
Earth is about ________
A) 6,000 years old B) 4.6 billion years old C) 4.6 million years old D) 40 billion years old E) 400,000 years old