To clone an animal by embryo splitting, ____
a. there must be two host animals and two fertilized eggs
b. a fertilized egg is collected from a donor mother and implanted into a host animal
c. an egg is fertilized by in vivo fertilization and remains in the host animal to mature
d. an embryo must be in a blastocyst stage in the host animals while the splitting takes place
e. an unfertilized egg is collected from a donor mother and then fertilized in a dish by in vitro fertilization
e
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Which of the following hypotheses relies on the chemical reaction between hydrogen sulfide (HS2) and iron (Fe) for the built up of a H2 concentration gradient to provide the necessary energy for the reduction of N2 to NH3?
A. Reducing Atmosphere Hypothesis. B. Extraterrestrial Hypothesis. C. Deep-Sea Vent Hypothesis. D. Both Reducing Atmosphere and Extraterrestrial Hypotheses. E. All three hypotheses use this exact reaction to create a chemical gradient to form amino acids.
Which one of the following methods of antimicrobial susceptibility testing is the most popular method in the United States? (Note: information about susceptibility testing can be found on the CD-ROM that accompanies this book.)
A) agar dilution method B) disk-diffusion method C) macro broth dilution method D) micro broth dilution method
A U.S. submarine surfaced __________ miles from
the nearest land in the artic and found polar bears hunting on the frozen sea. a. 100 b. 1,000 c. 500 d. 50,000 e. none of these
Identify the part of the atom that most determines the chemical properties of the atom
A) The number of shells B) The number of protons C) The number of neutrons D) The number of electrons