It’s Mystery Mollusk Monday, and you’ve been given a bucket full of animals that resemble aquatic worms. Your mystery mollusks don’t have shells, tentacles, eyes, or a foot, but they do have a radula. How do you classify these animals?
a. Monoplacophora
b. Solenogastres
c. Caudofoveata
d. Scaphopoda
c. Caudofoveata
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By knowing the interrelatedness of various snake species, the appropriate antivenom can be chosen. Based on the figure above, which snake antivenom would you administer to a person bitten by an Australian copperhead, if antivenom to the Australian copperh
A) taipan B) common brown snake C) red-bellied black snake D) death adder E) tiger snake
In your microbiology lab, your class is identifying bacteria. You are using dichotomous keys to aid in the identification process using the data from a variety of biochemical tests. What problems do you foresee in this procedure?
A. If you misread a biochemical test or write down the wrong result, the key will likely take you to an alternative organism that is not your unknown bacterium. B. Dichotomous keys are too sophisticated to read properly, so you are worried that there will be a large degree of error in your identification. C. The dichotomous key does not contain information on your bacterium. D. Dichotomous keys are not valid for identification.
Imagine that a Toll-like receptor (TLR) gene has duplicated and mutated, creating a leucine-rich region binding pocket that can now bind to the hemagglutinin protein in the envelope of influenza virus. What do you predict will happen to this novel gene?
A. It will be selected for and over evolutionary time will become an even better receptor for HA protein. B. It will continue to mutate, perhaps changing to bind other proteins or becoming deleted. C. It will spread from species to species. D. It will undergo VDJ rearrangement.
The largest number of food servings in your daily diet should be from
a. meats and beans. b. dairy products. c. vegetables and fruits. d. grains.