How successful is the technique of cloning adult mammals by implanting DNA into donor eggs?
a. Few embryos survive until birth, and of those that do, many have serious health problems.
b. About half of the embryos survive until birth, but many of these die before adulthood.
c. Of the embryos that survive until birth, health outcomes are predictable.
d. Most embryos survive, but are not able to reproduce as adults.
e. Most embryos survive and lead healthy adult lives.
ANSWER: a
You might also like to view...
What role, if any, did polysaccharides play in chemical evolution?
A) Polysaccharides catalyzed chemical reactions. B) Polysaccharides used complementary pairing between monosaccharides to copy themselves. C) Glycosidic linkages formed spontaneously between monosaccharides. D) Polysaccharides played little, if any, role in chemical evolution.
The vast majority of microorganisms found in soils have been successfully cultured in the laboratory.
Answer the following statement true (T) or false (F)
The acid growth hypothesis links
A. oligosaccharins to pH changes. B. cytokinin to thigmonasty. C. auxin to cell wall expansion. D. gibberellin to root elongation. E. ethylene to leaf abscission.
In which of the following environments could microorganisms be found?
A) Air B) Food C) Skin of a healthy individual D) Water E) All of the above