Individuals with mutations in excision repair enzymes may suffer from ____ due to unrepaired DNA damage caused
by ____.
a. skin cancer; mutations inherited from their parents
b. colon cancer; the passing of DNA mutations to daughter cells
c. prostate cancer; telomerase
d. skin cancer; the sun’s UV rays
e. skin cancer; complementary base pairing
d
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An individual tree can maintain a symbiotic relationship with many different species of mycorrhizae simultaneously
Indicate whether the statement is true or false.
Fungi that are important for fermentation of fruits
A. are yeasts. B. are facultative anaerobes. C. grow well at acid pH. D. secrete enzymes that degrade organic molecules. E. All of the choices are correct.
Which of the following is correct about the genetic code?
A. Archaea and bacteria use one code and eukarya use another. B. Fungi and animals use the same code, but plants use another. C. All prokaryotes use one code and all eukaryotes use another. D. All living organisms use the same genetic code. E. Protists use a different code than other kingdoms.
Why did the dinosaurs become extinct?
A. The pollen produced by the rise in flowering plants produced allergenic responses in dinosaurs and interfered with their ability to communicate with potential mates. B. Increasing carbon dioxide levels produced climates too hot for the incubation of their eggs. C. Cycads and other gymnosperms upon which herbivorous dinosaurs fed declined, and the dinosaurs were unable to digest the angiosperms that arose in their place. D. A meteorite or comet crashed into the Earth, causing smoke and ash that blocked the sun and caused death of the plants that were food for herbivorous dinosaurs. E. The changing climate caused the evolution of most dinosaur species into the existing bird, mammal, and reptile species that exist today.