In which of the following is the presence of different mating types critical to sexual reproduction?

A. Homothallic species
B. Heterothallic species
C. Arthrospore-producigin species
D. Sporangiospore-producing species


Answer: B

Biology & Microbiology

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Cyclic dimeric guanosine monophosphate (c-di-GMP) serves as a messenger molecule in bacterial cells to coordinate a shift from ________ to ________ growth

A) sessile / planktonic B) planktonic / sessile C) monomorphic / polymorphic D) stationary / exponential

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Which group includes the simplest of organisms that do not have a nucleus?

A. Archaea B. Protista C. Bacteria D. Archaea and Bacteria E. Fungi

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Anorexia and bulimia ________

A) occur when the body does not receive enough vitamin C B) occur when there is a protein-deficient diet C) occur mainly in affluent countries where thinness is idealized D) occur when a person does not obtain all the essential amino acids

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Which of the following is an energy-requiring mode of transport that brings substances into a cell?

A) Osmosis B) Simple diffusion C) Active transport D) Facilitated diffusion

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