Which of the following is (are) found in many veins that help direct blood flow in one direction only: toward the heart?

A) lymph nodes B) pericardium C) myocardium D) valves


Answer: D

Biology & Microbiology

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Which of these is the site for protein modification?

a. nucleus b. cytoskeleton c. mitochondria d. rough endoplasmic reticulum e. nucleolus

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What would a species that has a high number of alleles for many genes that are distributed throughout the population have?

A) low genetic variability B) high genetic drift C) high genetic variability D) a large amount of inbreeding depression

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How do bony fish regulate buoyancy?

A) With an air-filled swim bladder B) With a large, oil-filled liver C) By constantly swimming at an upwards angle D) Through the calcium in the bones, which makes the skeleton lighter than the water

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Which of the following processes requires oxygen?

A) The Krebs cycle B) Glycolysis C) The ETC D) Fermentation

Biology & Microbiology