Dennis had a history of heart disease in his family and was reducing his intake of saturated fats. Saturated means each carbon atom is bonded to as many hydrogen atoms as it can accept. If a carbon were bonded to two carbons, how many hydrogens could it accept?
A. 0
B. 1
C. 2
D. 3
E. 4
C
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Why does the existence of ribozymes offer a possible solution to the question of whether nucleic acids or proteins
appeared first in evolution?
What will be an ideal response?You are working as a botanist in a tropical forest, and have located a small plant that has never been seen or classified before. You learn from your dissection of this plant that it has vascular tissue. Yet, over the lifespan of the plant as it grows and matures in your greenhouse, you observe that it never produces seeds. It does produce small cluster of spore-forming capsules on the underside
of structures that resemble leaves. You classify the plant as a: a. liverwort b. fern c. horsetail d. bryophyte e. club moss
Nitrogen is made available to plants for their use by the process(es) of
a. ammonification only. b. nitrification only. c. nitrogen fixation only. d. ammonification and nitrification only. e. ammonification, nitrification, and nitrogen fixation.
A viral capsid is composed of subunits called:
a. Envelopes b. Nucleic Acids c. RNA d. Coats e. Capsomeres, which are in turn made of protomers