Which of the following is not a macromolecule by polymerization?

A) lipids
B) proteins
C) polysaccharides
D) polynucleotides
E) DNA


Ans: A) lipids

Biology & Microbiology

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How might ants on an acacia tree serve in a mutualistic relationship?

A) The ants fight off potential herbivores. B) The ants carry disease. C) The ants bring nitrogen to the tree. D) The ants bring sugar to the tree.

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In the accompanying figure, the formation of carbohydrates from carbon dioxide and water occurs in the portion oflabeled:a

A b. B c. C d. D e. E

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Four of the following are features found exclusively among all vertebrates. Which one is the exception?

a. notochord
b. pharyngeal gill slits
c. four legs
d. post-anal tail
e. dorsal nerve cord

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What type of symbiotic relationship is exemplified by athlete's foot?

A. Commensalism B. Atavism C. Mutualism D. Parasitism

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