Stage 2 of photosynthesis, sometimes referred to as the dark reactions, involves the reduction of CO2 to produce organic compounds such as sucrose. What cofactor is the electron donor for carbon fixation?
(a) H2O
(b) NADH
(c) FADH2
(d) NADPH
(d)
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The human ancestor whose populations dispersed from Africa to other parts of the world was
a. Homo sapiens b. Australopithecus afarensis. c. Pan troglodytes. d. Homo erectus.
Most edible fungi come from the fungal group that also contains:
a. poisonous mushrooms b. lichen c. penicillin d. bread mold e. glomeromycetes
Anaerobic respiration occurs in environments without oxygen. In doing so, some organisms have evolved mechanisms to produce ATP by using other ________ acceptors.
A. proton B. phosphate group C. NADPH D. electron E. fermentation
Molecular techniques led to the reinterpretation of morphologically based phylogeny such that
A. echinoderms and chordates were placed in entirely different clades. B. rotifers and nematodes were designated as closely related. C. annelids and arthropods were designated as closely related. D. Bilateria was designated as a monophyletic group. E. Ecdysozoa and Lophotrochozoa were designated as clades.