During inhalation, air leaving the nasal cavity passes into the
A) pharynx. B) bronchi. C) bronchioles. D) trachea. E) larynx.
A
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The normal microbiota of the lower urethra may show
A. Lactobacillus. B. Staphylococcus. C. Corynebacterium. D. Bacteroides. E. All of the choices are correct.
Plants produce sugars from
a. oxygen and carbon dioxide. b. sunlight and water. c. oxygen and water. d. carbon dioxide and water. e. iron and water.
Due to nuclear equivalence in different cell types, the presence of different cell types in any given organism is
accomplished by: a. differential gene expression. b. pattern formation. c. cloning. d. induction. e. nuclear transplantation
Some butterflies can ingest toxic chemicals from the milkweed plants they feed on and then can store those chemicals in their body. Because toxins stored in the butterflies are toxic to birds, the birds avoid eating the butterflies. Which of the
following is the best explanation for this situation? A) Butterflies that stored the chemicals were never eaten by predators, so those butterflies survived. B) Butterflies developed a mutation that led them to be able to store the chemical because they needed to avoid being eaten. C) Milkweed plants wanted the butterflies to ingest the chemical so they would no longer feed on the plant, but the butterflies fooled the milkweed by storing the toxic chemicals. D) Any butterfly allele that allowed milkweed toxin storage would be likely to persist because butterflies that had it were more likely to survive.