DNA molecules
A. are single stranded.
B. are only found in humans.
C. are protein.
D. are unique to every individual.
Answer: D
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The fossil record contains a sequence from simple to more complex organisms through time. Indicate whether the statement is true or false
In comparison to liquid water, the density of the ice in hail is:
A) 50% of water. B) 70% of water. C) 90% of water. D) no difference
Despite widespread use of insecticides and herbicides, infestations of insects, plant pathogens, and weeds currently, depending on the type of crop, cause a loss of about
A) 0 to 5% of potential agricultural production in the United States. B) 20% to 50% of potential agricultural production in the United States. C) 50% to 80% of potential agricultural production in the United States. D) more than 95% of potential agricultural production in the United States.
Why is it important for earth scientists to be able to identify the composition and distribution of rocks?
A. So they can locate economically important mineral and energy resources B. So they can identify the potential for future geologic hazards C. So they can piece together the history of Earth D. All are correct