The voice box is also referred to as the:a
larynx.
b. nasal cavity.
c. epiglottis.
d. pharynx.
e. trachea
A
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Which of the following is a possible reason why DNA uses thymine instead of uracil?
A. Thymine is more stable than uracil. B. Cytidine is deaminated to uracil so it would be difficult for any repair mechanism to differentiate between uracil that belongs in the sequence and uracil that resulted from deamination. C. Adenine is deaminated to uracil so it would be difficult for any repair mechanism to differentiate between uracil that belongs in the sequence and uracil that resulted from deamination. D. When uracil is bound to a deoxyribose it will become more reactive, forming covalent bonds with other bases. E. None of these choicesis correct.
Pheromones are ____ signals
a. tactile b. electrical c. acoustical d. visual e. chemical
The absorption and re-radiation of longwave radiation by gases in the atmosphere is called the ________
Fill in the blank(s) with correct word
Which of the following is NOT needed for genetic equilibrium to occur?
a) no natural selection b) speciation c) no genetic drift d) no mutations