Which statement about gene mutations is FALSE?
A. All mutations are transmitted to the next generation.
B. Mutations are rare but their rates can be predicted.
C. Mutations with beneficial effects will be favored by natural selection.
D. Many mutations reduce an individual's chance of surviving and reproducing.
E. Mutations with neutral effects neither help nor hurt the individual.
Answer: A
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Which of the following is true of NAD+?
A) It is derived from vitamin E. B) It serves as an electron source for biological oxidation. C) It is a coenzyme. D) It releases an adenosine to become NADH. E) It represents the reduced form of niacin.
The organisms that make up lichen:
a. benefit from each other b. infect human body surfaces c. increase the surface area of plant partners d. obtain sugar by fungal photosynthesis e. are plant parasites
Which of the following is NOT a characteristic of "prediabetes"?
a. high levels of HDL, the "good" cholesterol b. "apple shaped" body c. blood pressure of 130/85 mm Hg or higher d. fasting glucose of 110 mg/Dl or higher e. fasting triglyceride level of 150 mg/Dl or higher
Why have tomatoes been genetically modified?
A) to improve absorption of vitamins in the human body B) to grow rapidly before temperatures fall below freezing C) to kill insect pests on contact D) to have a longer shelf life in grocery stores