Which of the following pairs are NOT homologous?
A. the wing of a bat and the front flipper of a whale
B. the wing of a bat and the wing of a chicken
C. the foreleg of a turtle and the front flipper of a whale
D. the wing of an insect and the wing of chicken
E. both the wing of an insect and chicken and the wing of a bat and chicken
D. the wing of an insect and the wing of chicken
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Which is/are true of coenzymes?
A. They are organic molecules. B. They transfer atoms from one molecule to another. C. They may bind to a number of different enzymes. D. They are synthesized from vitamins. E. All of the choices are correct.
The oxygen content of dry air in the atmosphere
A. varies depending on the altitude. B. is about 21.0%. C. is inversely proportional to the partial pressure of oxygen. D. is about 0.03%. E. is about 78.1%.
Perfect flowers must have
a. reproductive structures of both sexes. b. petals. c. sepals. d. an attractive scent. e. all of these.
The set of transcripts present in a cell or organism is called the _____
Fill in the blank(s) with correct word