Coal is
a. a nonrenewable resource
b. a fossil fuel
c. rich in stored carbon energy
d. organic remains of ancient seedless plants
e. all of the above are true
Answer: e
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You arrive late to a biological seminar. However, just as you enter the room, you hear the speaker referring to the "five-prime end" and the "three-prime end" of a macromolecule. Immediately, you know that they are talking about a:
A. carbohydrate. B. protein. C. DNA. D. lipid.
When performing gene therapy, DNA can be introduced into human cells by using genetically engineered ____, which
are designed to deliver their genetic material into the cells they infect.
a. sheep cells b. mouse cells c. bacteria d. plasmids e. viruses
Which of the following is a hominin?
a. chimpanzee b. Australopithecus c. baboon d. chimpanzee and Australopithecus e. chimpanzee, Australopithecus, and baboon
A human cell with a total of 23 chromosomes is:
a. diploid. b. aneuploid. c. polyploid. d. haploid.