The letter "A" from the above figure represents
a. ectoderm.
b. endoderm.
c. mesoderm.
d. neural plate.
e. yolk
D
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In the Calvin cycle, NADPH is __________
A. oxidized B. reduced C. phosphorylated D. oxidized and reduced E. None of the answer options is correct.
Represented by only two living genera, Psilotum and Tmesipteris, ____ resemble the extinct Cooksonia. Having no
true roots or leaves, these seedless vascular plants are essentially forking green stems.
a. mosses b. whisk ferns c. ferns d. club mosses e. horsetails
With ____ selection(s), the intermediate form
of a trait is favored.
a. stabilizing b. directional c. disruptive d. frequent e. none of these
Which of the following structures in the life
cycle of a plant are diploid?
a. spores b. gametophytes c. gametes d. sporophytes e. all of these are diploid