In eukaryotic cells, how can a single gene encode for more than one protein?
A. by using different codons
B. by transcribing multiple copies of mRNA
C. by removing different combinations of introns
D. by using transgenes
E. by mutating their genes
C. by removing different combinations of introns
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What molecule contributes to the red color of slow-twitch muscle fibers?
A. myoglobin B. ATP C. glycogen D. lactic acid E. fatty acids
Which statement related to gymnosperm reproduction is true?
A) Spores produce pollen grains, which contain sperm. B) Two sperm are required to fertilize the ovule. C) Many gymnosperms rely on insects for pollination. D) Gymnosperm reproduction is so inefficient that gymnosperms do not grow very tall or live for very long.
When you look at a picture of a dog and then correctly identify it, what have you done in your conscious mind?
A) proprioception B) perception C) photoreception D) podsolization
Which of the following is currently the leading cause of extinction?
a) overexploitation b) introduced species c) habitat loss d) pollution e) disease