Which of the following is most abundant in the trachea and bronchi, becoming much less dense (and eventually absent) in the bronchioles?
A) macrophages
B) type II alveolar cells
C) smooth muscle cells
D) goblet cells
E) cartilage
Ans: E) cartilage
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Coloration in the peppered moth (Biston betularia) is determined by a single gene with two alleles showing complete dominance. Dark moths are homozygous dominant or heterozygous for the gene, light moths are homozygous recessive. In a sample of 100 moths, you determine that 64 of the moths are dark. According to the Hardy-Weinberg rule, the expected frequency of the dominant allele is ___.
A. 0.4 B. 0.36 C. 0.6 D. 0.64 E. cannot be determined Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the innate defense mechanisms can lyse bacteria and mark cells for phagocytosis?
What will be an ideal response?
Pain is
a. one of the special senses. b. the perception of injury. c. dependent on interpretation by the brain. d. the perception of injury and dependent on interpretation by the brain. e. one of the special senses, the perception of injury, and dependent on interpretation by the brain.
In humans, fiber does all of the following EXCEPT
A. provide energy. B. prevent constipation. C. help control weight gain. D. prevent hemorrhoids.