6. A hypothesis _____
is the only possible answer to a question
must be tested through experiments
can be rejected by the results of the experiments
all of the above
b and c only
b and c only
Explanation: A hypothesis must be testable and can be accepted or rejected following the results of the experiment.
Even if it is accepted, the hypothesis remains what seems to be the best possible explanation but is not necessarily the only correct one. A hypothesis can be shown to be false, but it can never be proven to be true.
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Suppose, while out camping in a forest, you found a chordate with a long, slender, limbless body slithering across the ground near your tent. This critter could be _____
A) a lampreys B) a lungfish C) a mammal D) an amphibian E) a skate
Reinforcement is most likely to occur when _____
A) the environment is changing B) hybrids have lower fitness than either parent population C) prezygotic isolating mechanisms are in place D) gene flow is low
Molebdenum is a cofactor for nitrogenase, which means every nitrogen-fixing microorganisms will not be able to fix nitrogen without Mo
Indicate whether the statement is true or false.
The idea that geologic processes have formed
the earth's surface by repeating the same actions over and over is known as a. the theory of catastrophism. b. plate tectonics. c. continental drift. d. the theory of uniformity. e. the theory of relativity