This type of lipid is found in pigments such as chlorophyll, in the visual pigment retinal, and in rubber:
A. terpene.
B. prostaglandin.
C. wax.
D. steroid.
E. phospholipid.
Answer: A
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Which of the following statements is true?
A. Lactic acid is a product of aerobic respiration; ethyl alcohol is a product of fermentation. B. Oxygen is a product of cellular respiration; carbon dioxide is a product of photosynthesis. C. Glucose is a product of aerobic respiration; lactic acid is a product of anaerobic respiration. D. Oxidation is the loss of electrons; reduction is the gain of electrons.
Acute viral gastroenteritis is the leading cause of death in
A. children in the United.States. B. children in developing countries. C. children in day care centers. D. children worldwide.
d. response to a stimulus
a. order b. sensitivity to stimuli c. reproduction d. adaptation
A botanist identifies a new species of plant that has 32 chromosomes. It grows in the same habitat with three similar species: species A (2n = 14), species B (2n = 16), and species C (2n = 18). Which of the following is a possible mechanism by which the new species could have arisen from the others?
a. Either autopolyploidy due to a nondisjunction in the formation of gametes of species B or allopolyploidy associated with hybridization between species A and C b. Allopatric divergence by development of a mechanical reproductive isolating mechanism c. Autopolyploidy due to a nondisjunction in the formation of gametes of species B d. Allopolyploidy associated with hybridization between species A and C e. Change in a key developmental gene that causes the plants to flower at different times