C4 plants occur more commonly in desert conditions because _________.

A. C4 plants produce water as a product of their photosynthetic pathways.
B. C4 plants can shuttle CO2 to the sites of photosynthesis even when their stomata are closed to conserve water.
C. C4 plants can conserve water even with their stomata open.
D. C4 plants are succulent (water-storing) plants.


B. C4 plants can shuttle CO2 to the sites of photosynthesis even when their stomata are closed to conserve water.

Biology & Microbiology

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If two triploid species interbreed, the offspring will be

A. allotriploid. B. allotetraploid. C. allohexaploid. D. alloheptaploid. E. allonanoploid.

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The offspring of two heterozygous gray-bodied, normal-winged flies should be 50% gray-bodied/normal wings

(BbRr) and 50% black-bodied/vestigial wings (bbrr) because these alleles are linked. Suppose a small number, say 15%, of the offspring are instead black-bodied with normal wings. This is most likely the result of: a. crossing-over. b. incomplete dominance. c. codominance. d. an error in meiosis.

e. mutation

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A newly discovered prokaryote produces a compound with promising antimicrobial effects. Devise a set of tests to determine whether the antimicrobial is broad or narrow spectrum and bactericidal or bacteriostatic

What will be an ideal response?

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Which one of the following was not an adaptation seen in the sharks (Chondrichthyes)?

A. teeth B. lateral line system C. swim bladder D. calcified cartilaginous skeleton E. internal fertilization and internal development

Biology & Microbiology