What is the evolutionary relationship between mutation rates and DNA proofreading and repair?
What will be an ideal response?
ANS:
Because DNA has proofreading and repair, the mutation rate is lower than that of RNA, allowing transmission of large amounts of genetic information unaltered.
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During a drought on the Galapagos islands, finches with larger beaks were able to crack the large tough seeds produced by plants that survived the dry conditions. This is an example of ____.
A. genetic drift B. a founder effect C. stabilizing selection D. directional selection E. disruptive selection
In Drosophila (fruit fly), red eyes is the wild type trait and purple eyes is a mutant version. Normal wings are wild type while curly wings is a mutant version. Which of the following genotype is correct for a homozygous red eyed, curly winged fly?
a) p+/p+ c/c b) p/p c/c c) p+/p+ c+/c d) p+/p c/c
Which human activity is NOT a threat to biodiversity?
A) Application of synthetic fertilizers B) Importing pigs and goats in Hawaii for food C) Cattle ranching D) Building a large sugarcane plantation in a tropical rain forest E) No-till farming
Which parasite is commonly transmitted to humans through uncooked beef, lamb, or pork and through infection from cats, which serve as obligate hosts?
a. Cyclospora cayetanensis b. Leishmania spp. c. Toxoplasma gondii d. Trypanosoma brucei