What type of microorganisms reproduce by binary fission?

A. only prokaryotic microorganisms
B. Unicellular microorganisms
C. only eukaryotic microorganisms
D. multicellular organisms


B. Unicellular microorganisms

Biology & Microbiology

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Although each of the following has a better chance of influencing gene frequencies in small populations than in large populations, which one most consistently requires a small population as a precondition for its occurrence?

A) mutation B) nonrandom mating C) genetic drift D) natural selection E) gene flow

Biology & Microbiology

Frigatebirds have been observed to pirate food by:

a. perching on feeding pelicans and then stealing fish. b. beating and jostling boobies in flight, forcing them to regurgitate their food - then seizing it. c. preying on other birds. d. both a and b. e. both b and c.

Biology & Microbiology

Which lineage of Echinoderms is made up of about 2000 species of brittle stars and basket stars, each with elongated, slender, somewhat snakelike arms surrounding a well-defined central disk?

a. Ophiuroidea b. Echinoidea c. Holothuroidea d. Crinoidea

Biology & Microbiology

What would be the best anatomical feature to look for to distinguish a gastropod from a chiton?

A) presence of a muscular foot B) presence of a rasp-like feeding structure C) production of eggs D) number of shell plates

Biology & Microbiology