The loss of which species on the figure above represents the loss of the most significant phylogenetic diver-sity?
a. A
b. B
c. C
d. D
e. D and E
A
Biology & Microbiology
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If carbon has an atomic mass of 12 and an atomic number of 6 then it has
A. 6 electrons. B. 12 electrons. C. 18 electrons. D. as many as 6 but no more than 12. E. None of the choices are correct.
Biology & Microbiology
Which neurotransmitter stimulates skeletal muscle contraction, slows cardiac muscle contraction rate, and affects
mood and memory?
a. acetylcholine b. epinephrine c. dopamine d. serotonin e. an endorphin
Biology & Microbiology
Which of the following types of mutation may play an important role in driving evolution because they are often nonlethal and, therefore, remain in the gene pool?
A. Frameshift B. Nonsense C. Missense D. Deletion
Biology & Microbiology
The electrons for photosynthesis come from ____.
A. ATP B. electrolytes C. NADP+ D. chlorophyll a E. H2O
Biology & Microbiology