What type of blood vessels has the slowest velocity of blood flow?
A) arteries
B) arterioles
C) veins
D) capillaries
Answer: D
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How is the heart rate controlled by the nervous system in an intact organism?
What will be an ideal response?
How do phosphates from the oceans reach rivers and lakes?
a. Phosphates dissolved in evaporated sea water precipitate over lakes and rivers. b. Phosphates form sedimentary rocks that are then uplifted by tectonic activity. c. Phosphates from animal bones collect in rivers and lakes where they slowly dissolve. d. Phosphate-rich sediment from the ocean floor is carried inland by hurricanes and tropical storms.
What is the benefit of using the Earth’s magnetic field to migrate compared to the sun or stars? What will be an ideal response?
Which of the following statements most accurately describes transformation in bacteria?
A. Transformation is the creation of a strand of RNA from a DNA molecule. B. Transformation is the infection of cells by a phage DNA molecule. C. Transformation is the creation of a strand of DNA from an RNA molecule. D. Transformation is the assimilation of external DNA into a cell.