Plants that show a pattern of stomatal opening and closing that is the reverse of C3 plants are called
A. CAM.
B. C4.
C. Calvin cycle.
D. Temperate.
Answer: A
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What two gases have a profound effect on the type of organisms that can live in an area and influences the regions carrying capacity?
a. Carbon dioxide and nitrogen b. Carbon dioxide and bicarbonate c. Oxygen and carbon dioxide d. Oxygen and nitrogen
Which of the following is a type of ecdysozoan protostome?
a. Echinodermata b. Ctenophora c. Molluska d. Chordata e. Nematoda
What is the principal substance that causes
phototropism in stems or leaves?
a. auxin b. gibberellin c. abscisic acid d. ethylene e. all of these
The term "2n" means
a. the diploid chromosome number is present. b. the haploid chromosome number is present. c. chromosomes within a single nucleus exist in homologous pairs. d. both a and c.