If the wild type DNA sequence reads THE CAT ATE THE BIG RAT, what type of mutation would change the sequence to THE CAT ATE THE BAG RAT?
A. insertion
B. deletion
C. silent
D. missense
E. nonsense
Answer: D
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All of the following are true statements about events that occur in the apicomplexan life cycle EXCEPT
A. The haploid and diploid generations alternate. B. The sporozoite is the motile infective stage. C. Often two completely different organisms host different stages of the life cycle. D. The life cycles include both sexual and asexual stages. E. There is no exception here. All of these statements are true.
What is an advantage for using Arabidopsis to study plant development and genetics?
a. The Arabidopsis genome is largely unstudied, and therefore there is a lot that scientists can learn. b. Arabidopsis mutants can be easily induced with chemicals. c. There are no developmental mutants in Arabidopsis, therefore, normal development can be studied easily. d. This plant completes its life cycle in just a few months. e. This plant is a weed of no economic importance
To take advantage of ecotourism, a resort is built near a coral reef so that tourists can observe the spawning that occurs shortly after a full moon. As an added benefit, several species of colorful fishes are attracted to the area
Tour boats go out nightly and shine large spotlights to attract the fish. Tourists are enchanted by the display of fishes but have begun to question why spawning among the corals has ceased. What is the probable cause for the lack of spawning? A) The spotlights are causing the corals to spawn during the day rather than at night. B) The tourists are too loud. C) Corals time their spawning by the phase of the moon; spotlights mimic the full moon, so spawning can't occur. D) The fish are eating the spawn. E) The fish are releasing chemical signals that interfere with spawning among the corals.
Sam works in construction and stepped on a sharp nail. He can't remember the last time he had a tetanus shot. What type of immunity is the most important for him to receive?
A. artificial passive immunity B. natural passive immunity C. natural active immunity D. artificial active immunity