What does the circled part of the phylogenetic tree above indicate?

A) an adaptive radiation
B) a mass extinction event
C) rapid speciation
D) an adaptive radiation and rapid speciation


D

Biology & Microbiology

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Which pathway(s) are used by eukaryotic microorganisms to fix carbon dioxide?

A. Entner-Doudoroff B. Calvin-Benson cycle C. Reductive tricarboxylic pathway D. None of the choices are correct.

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A reducing medium contains

A. sugars that can be fermented. B. inhibiting agents. C. extra oxygen. D. hemoglobin, vitamins, or other growth factors. E. substances that remove oxygen.

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In glycolysis, a six-carbon glucose molecule is converted to two three-carbon molecules of:

a. pyruvate. b. acetate. c. coenzyme A. d. oxaloacetate. e. citrate.

Biology & Microbiology

Stabilizing selection occurs more often than disruptive selection.

a. true b. false

Biology & Microbiology