In humans spermatogenesis and oogenesis differ in a number of ways. Which of the following is NOT one of them?
a. number of functional gametes produced by a single meiosis event
b. ploidy of final meiotic products
c. timing of meiotic divisions (when they occur in the male/female life cycle)
d. number of gametes produced in a given time period
e. all of these are differences between human male and female gametogenesis
Answer: b. ploidy of final meiotic products
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A fourth type of restriction enzyme is identified that cleaves at precise locations like a type II enzyme, but it also occasionally makes mistakes and cuts elsewhere. Would this type of enzyme be a useful enzyme to use in molecular cloning?
A. Yes, because it cuts correctly sometimes. B. No, because it is a precise enzyme. C. No, because cutting mistakes could lead to incorrect cloning. D. Yes, because cutting mistakes don't matter in molecular cloning. 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 restriction enzymes? 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?
Approximately how many neurons comprise the human brain?
a. 1,000 b. 50,000 c. 100,000 d. 75,000,000 e. 86,000,000,000
Which of the following is not one of the seven main groups of odors that humans can detect?
a. musk b. floral c. herbaceous d. putrid e. peppermint
Chlorophyll's most important role during photosynthesis is:
A) keeping the leaves of plants green. B) capturing electrons that can, in turn, be used by carotenoids. C) turning color in the autumn each year. D) converting light energy from the sun into chemical energy. E) turning into a molecule of ATP upon being struck by sunlight.