In general, yeast reproduces asexually by the formation of:
a. ascospores.
b. basidiospores.
c. blastoconidia.
d. arthroconidia.
C
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Studies of snapping shrimp on either side of the Isthmus of Panama have shown that each Caribbean shrimp species is more closely related to a Pacific shrimp species than it is to any other Caribbean shrimp species. The most likely explanation for this result is
A. snapping shrimp in the Caribbean and the Pacific were never part of the same population. B. snapping shrimp species in each ocean diverged prior to the formation of the Isthmus of Panama. C. snapping shrimp species in each ocean diverged after the formation of the Isthmus of Panama. D. creation of the Panama Canal allowed interbreeding between populations of shrimp. 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 sympatric and allopatric speciation? 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?
Old man's beard (Usnea trichodea) and yellow Evernia lichens are sensitive to elevated levels of
a. sulfur dioxide (SO2). b. nitrogen oxides. c. nitrate. d. sunlight. e. fluoride salts.
V Fill in the blank(s) with the appropriate word(s)
In recent times, it has been shown that adult cells can be induced to become pluripotent stem cells (iPS). To make this conversion, what has been done to the adult cells?
A) A retrovirus is used to introduce four specific regulatory genes. B) The adult stem cells must be fused with embryonic cells. C) Cytoplasm from embryonic cells is injected into the adult cells. D) The nucleus of an embryonic cell is used to replace the nucleus of an adult cell.