The diploid number of chromosomes on a human skin cell is 46. What is the number of chromosomes found in a human egg cell?
A) 92 B) 12.5 C) 23 D) 46 E) 184
C
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You notice that in your aquarium, previously full of undoubtedly male fish, one is laying eggs. Upon a bit of research, you find out that the species of fish you purchased is a sequential hermaphrodite. Which of the following is true?
A. One of the male fish underwent protandry and became a female. B. One of the male fish fertilized its own eggs. C. Since the fish are hermaphrodites, one of the male fish laid eggs and another will likely fertilize them. D. The fish have parthenogenesis, therefore their eggs do not have to be fertilized to be viable. E. The fish have protogyny, which allows the males to lay eggs. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about different reproductive strategies? What other information is related to the question? Choose Answer Given what you now know, what information 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?
All of the microtubules are the same length, and homologous chromosomes are aligned midway between the spindle
poles at ____. a. telophase I b. metaphase I c. anaphase I d. metaphase II e. anaphase II
Hybridization between populations upon secondary contact may result in ________
A) reinforcement of the two original species by way of pre- or post-zygotic isolating mechanisms B) the creation of one or more new species as hybrids between the two parental species C) the creation of a hybrid lineage that has higher fitness than either of the parental species D) All of the above are possible. E) None of the above are possible.
Which of the following cycles have particles deposit from the atmosphere in both a dryfall and a wetfall?
A) nitrogen B) oxygen C) carbon dioxide D) sulfur