In the human body, the enzyme lactase acts on which substrate?
A) lactose
B) galactose
C) lactic acid
D) glucose
Answer: A) lactose
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Sensory pathways of smell and taste
a. begin with chemoreceptors. b. end up in the cerebral cortex. c. reach the limbic system. d. are integrated with stored memories. e. include all of these.
Human muscle cells can perform
A) lactic acid fermentation and aerobic cellular respiration. B) alcoholic fermentation. C) aerobic cellular respiration. D) alcoholic fermentation, lactic acid fermentation, and aerobic cellular respiration. E) lactic acid fermentation.
A new plant species is introduced to Daphne Major and produces small, thin seeds. This plant species is highly adapted to drought and after 5 years has replaced over 80% of the native plants that produce large seeds. How will this change affect the evolution of beak size in the medium ground finch population?
A. Small beaks will be favored under all rainfall conditions. B. Large beaks will be favored in wet years and small beaks will be favored in dry years. C. Large beaks will be favored under all rainfall conditions. D. Small beaks will be favored in wet years and large beaks will be favored in dry years.
Which of the following statements about drug resistance is FALSE?
A) It may be carried on a plasmid. B) It may be transferred from one bacterium to another during conjugation. C) It may be due to enzymes that degrade some antibiotics. D) It is found only in gram-negative bacteria. E) It may be due to increased uptake of a drug.