Which of the following are used by cyanobacteria for reproduction?

A. Fragmentation
B. Binary fission
C. Budding
D. All of the choices are correct.


Answer: D

Biology & Microbiology

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In chordates, which mesoderm structure forms during gastrulation and provides structural rigidity along the dorsal anterioposterior axis of the embryo?

A. archenteron B. neural tube C. notochord D. epidermis E. intestinal tract

Biology & Microbiology

A human population living without medical care in a developing country would probably have ____

a. a rectangle-shaped age structure diagram b. an r value < 0 c. a pyramid-shaped age structure diagram d. per capita birth and death rates consistent with those of a stage 4 society e. no density dependent factors operating

Biology & Microbiology

NADPH is made by

A. the Krebs cycle. B. glycolysis. C. chemiosmosis. D. the Calvin cycle. E. the passing of electrons from photosystem I to an electron transport chain.

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Suppose a plant had a photosynthetic pigment that absorbed far-red wavelengths of light. In which of the following environments could that plant thrive?

A) on the surface of a lake B) on the forest floor, beneath a canopy of taller plants C) on the ocean floor, in very deep waters D) on mountaintops, closer to the Sun

Biology & Microbiology