Is it possible to prevent mutations entirely?
What will be an ideal response?
ANSWER: No, it is not. DNA polymerase is not perfect and as a result it can introduce mistakes (mutations) during DNA replication. However, you can reduce the number of mutations experienced by avoiding undue exposure to ionizing radiation, UV radiation and chemical carcinogens.
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Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is
A. impossible since carbon can't enter a living system more than once. B. possible since carbon cycles through the biosphere. C. highly unlikely since carbon is always tied up in molecules in organisms or minerals. D. possible only if you are a cannibal.
Eukaryotes arose about ________ years after the first prokaryotes
A) 3.0 million B) 1.7 billion C) 3.5 billion D) 4.0 billion
If one is planning to use multiple regression to summarize how the variables X1, X2, X3 explain the variation in Y, how many moment conditions are involved in estimating the linear regression?
A. 2 B. 3 C. 4 D. 5
What type of plant would be least affected by the loss of the guard cell function that closes stomata?
A. a carnivorous plant B. a desert plant C. a rainforest plant D. a plant from the plains of the American midwest E. a poisonous plant