The metabolic diversity of photosynthetic bacteria stems from different
A) bacteriochlorophylls and pigments they contain.
B) chlorophylls they can have and organic compounds they can produce.
C) light-harvesting complexes, electron donors, and organic compounds they produce.
D) unrelated taxa capable of photosynthesis.
Answer: C
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When light hits a pigment, how many electrons are excited by a single photon?
a. one b. two c. three d. four
The most common cause of extinction is
A) interactions with other species. B) limited species range. C) habitat change. D) overspecialization. E) asteroid impacts.
A particular segment formed during normal Drosophila development
A. can form different structures, depending on positional information received by the segment during early development. B. will express different transcription factors in different individuals. C. will always form the same structures in adult flies. D. is only important to early developmental stages. E. will become ectoderm, endoderm, or mesoderm.
All of the following pertain to glycolysis EXCEPT
A) Occurs during formation B) Involves reduction of NAD C) Occurs without oxygen D) Degrades glucose to CO2 and H2O E) Ends with formation of pyruvic acid