In performing research, you treat frog zygotes with antibodies that bind E-cadherin. As a result, you expect
A) the cells to become exclusively muscle tissue.
B) the cells to be loosely associated and abort development.
C) the cells to be loosely associated and develop into a novel strain of frog.
D) the cells to divide uncontrollably.
E) no change with regard to development.
B) the cells to be loosely associated and abort development.
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Which of the following situations would be MOST likely to produce a new species?
A. A group of polyploid individuals arises by an abnormal meioses. The polyploids can only produce viable offspring by mating with each other. B. Several individuals join an existing population and introduce several new, beneficial alleles. C. Several individuals colonize a new area and establish a population. Migration between the two populations is common. D. An existing species becomes subdivided by a glacier and the resulting groups remain physically isolated from each other for thousands of years. When the glacier melts, the two groups are able to interbreed. E. A volcano erupts and kills all of the frogs on an island, along with many other species. New frogs colonize the island and begin reproducing rapidly because there are no longer any frog predators.
The function of a single fruit fly gene was inactivated completely by mutation. A fruit fly with this mutation did not have legs. Which is a reasonable conclusion to make based on this information?
A) The normal gene function is required for viability in fruit flies. B) The normal gene function is required for leg formation in fruit flies. C) The normal gene is unlikely to regulate other genes involved in leg formation. D) The normal gene is likely required in fruit flies for formation of legs, wings, and antenna.
The most likely reason that glucose dissolves in
water is that it is a. an ionic compound. b. a polysaccharide. c. polar and forms many hydrogen bonds with the water molecules. d. a very unstable molecule. e. highly nonpolar.
DNA technology can be applied to prevent, detect, and treat genetic diseases.
Indicate whether the statement is true or false