What is polyploidy?
a. less than the correct number of chromosome sets
b. an extra chromosome 21
c. more than the correct number of chromosome sets
d. a missing sex chromosome
c. more than the correct number of chromosome sets
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Restriction endonucleases are produced by
A. fungi. B. protozoa. C. plants. D. bacteria. E. All of the choices are correct.
Many proto-oncogenes encode ____
a. growth inhibiting factors b. intracellular receptors
c. tumor suppressor proteins d. receptors for growth inhibiting factors e. growth factors
The kidneys produce urine, maintain water balance, and regulation salt balance.
a. true b. false
Which of the following is NOT a function of plastids?
A) Extracting energy from food and converting it to ATP B) Storing pigments C) Storing photosynthetic products D) Carrying out photosynthesis