Which of the following is NOT a predisposing factor of disease?
A) lifestyle
B) genetic background
C) climate
D) occupation
E) All of these are predisposing factors of disease.
E
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Which of the following can be used to isolate pure cultures of bacteria from mixtures?
A. Streak plates B. Pour plates C. Spread plates D. All of the choices are correct.
You are given two populations of true-breeding tomato plants with two traits that sort independently. Using the multiplication rule, how many of the F2 progeny would you expect to have a dominant phenotype for both traits?
A. 9/16 B. 6/16 C. 3/16 D. 1/16
Your colleague is studying a newly discovered organism. She is becoming increasingly convinced that the organism is an arthropod. You find that you must respectfully disagree when you note that the organism has a set of distinctly nonarthropod characteristics. The features that cause you to exclude the organism from the arthropod grouping are
A. jointed legs, ecdysis, and an exoskeleton. B. antennae, six legs, and mandibles. C. compound eyes, book lungs, and a hemocoel. D. Malpighian tubules, ommatidia, and tagmata. E. pseudocoel, closed circulatory system, and ventral heart.
A lymph capillary is composed of ____
a. a single layer of endothelial cells surrounded by collagen fibers b. a single layer of endothelial cells surrounded by elastic fibers c. collagen fibers only d. elastic fibers only e. a single layer of endothelial cells only