When does a C4 plant use rubisco to perform carbon fixation?
a. in daylight only
b. from noon to midnight
c. from midnight to noon
d. in darkness only
Ans: a. in daylight only
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If the enzyme catalyzing the N to O reaction is inhibited, there will be a build-up of which compound?
a. M b. N c. O d. P e. Q
In many plant species, older roots and stems thicken by activity at _____
a. apical meristems c. vascular cambium b. cork cambium d. both cork and vascular cambium
Which of the following is physically the largest?
A. HIV B. RNA molecule C. E. coli cell D. Human T cell
In chickens, both males and females inherit autosomal genes that control the ability to lay eggs but only hens (females) actually lay eggs. This is an example of a _______________ trait.
a) sex-limited b) sex-linked c) sex-influenced d) maternal influence effect