The spinal cord is part of the ________ nervous system.
A. somatic
B. autonomic
C. peripheral
D. central
Answer: D
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The suffix -emia means in the
A. body. B. lymph. C. interstitial tissue. D. blood.
The main product of the Calvin cycle is
A. carbon dioxide. B. a carbohydrate. C. oxygen. D. ATP. E. NADPH.
Which of the following statements concerning biofilms is FALSE?
a. They are formed by bacteria living in a watery environment. b. They enable bacteria to attach to solid surfaces. c. They are usually less than 2 ?m thick. d. An example is dental plaque. e. They may develop on surgical implants.
What is the best explanation for why the arthropods, such as insects, spiders, and crabs, were the first animals to move onto land?
a. The majority of early arthropods did not have to have a moist environment for their survival. b. They possessed primitive lungs. c. They had stout, fleshy fins that allowed them to crawl on land. d. By chance, they already possessed structures suited to life on land so the transition was easier. e. When they moved to land, they encountered no predators.