During endocytosis, if a bacterial cell is not degraded and bacterial DNA is taken up by the eukaryotic cell, what may have occurred?

A. vertical evolution.
B. horizontal gene transfer.
C. vertical exon shuffling.
D. chromosomal duplication and genomic exchange.
E. both chromosomal duplication and vertical evolution.


B. horizontal gene transfer.

Biology & Microbiology

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Unsaturated fatty acids are those containing ________ carbon-carbon double bond(s).

A. exactly two B. one or more C. two or more D. only one

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In estuaries at high latitudes, which of the following factors strongly influences mixing?

a. Oxygen concentrations b. Nutrient concentrations c. Carbon dioxide concentrations d. Temperature e. Turbidity

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Which of the following is false regarding age-related

macular degeneration? a. It results in progressive destruction of photoreceptors in the fovea and surrounding region. b. It clouds the center of the visual field. c. It has no genetic basis. d. Smoking, high blood pressure, and obesity increase its risk. e. It cannot be cured, but its progression can be slowed.

Biology & Microbiology

Zygospores are formed by

A. chytridiomycota. B. ascomycota. C. zygomycota. D. basidiomycota. E. glomeromycota.

Biology & Microbiology