The nucleotides within DNA are composed of a
A. phosphate group, ribose sugar, and nitrogenous base.
B. sulfur group, ribose sugar, and nitrogenous base.
C. phosphate group, deoxyribose sugar, and nitrogenous base.
D. sulfur group, deoxyribose sugar, and nitrogenous base.
E. phosphate group, hexose sugar, and nitrogenous base.
C. phosphate group, deoxyribose sugar, and nitrogenous base.
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According to the Endangered Species Act, what is required when a species is identified as at-risk?
a. A management plan to protect the species must be created. b. Land must be purchased by the government to protect the species. c. A biodiversity hotspot must be established to protect the species. d. The habitat of the species must be maintained or restored.
Biomagnification usually happens for chemicals that
A. are not readily degraded. B. dissolve in fat. C. dissolve in water. D. are not readily degraded and dissolve in fat. E. are not readily degraded and dissolve in water.
The molecule below is a(n)
A. amino acid.
B. carbohydrate.
C. lipid.
D. nucleic acid.
Signals can be sent from the ECM to the cell through
A. cadherins. B. integrins. C. connexins. D. claudins. E. fibronectins.