Suppose that a meteorite crashes into Earth and a sample of it is taken to a local research lab for analysis. Embedded several inches within the rocky structure, a microscopic cluster of dormant, spore-like structures is found
The scientists culture some of this material in a standard microbiological nutrient broth, and they are surprised to find many single-celled "organisms" moving around, growing, and reproducing in the broth. The "organisms" behave the same in both daylight and dark conditions, do not require oxygen, and thrive under a wide range of temperatures and pH levels. They stop moving, growing, and reproducing, however, when fewer nutrients are available in the medium.
In this scenario, the "organisms" most closely resemble a(n)
A) nonliving virus.
B) autotrophic species of Eukarya.
C) heterotrophic species of Eukarya.
D) photosynthetic species of Bacteria.
E) heterotrophic species of Archaea.
E
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In the first three stages of cellular respiration, the chemical energy in glucose is transferred to:
A. ATP and cytochrome b. B. electron carriers and ATP. C. cytochrome b and coenzyme Q. D. proton pumps and ATP. E. only coenzyme Q.
. Identification of the various strains of N. meningitidis is through
A. Gram staining. B. serogrouping. C. fluorescent antibodies. D. titering.
Most of the effort involved in recombinant DNA technology involves
A) identifying and separating cells that contain the gene of interest. B) finding a restriction enzyme to cut DNA from a donor cell. C) identifying a cloning vector that can hold a gene. D) finding uses for recombined DNA.
The pathway from ____ sex to ____ sex can be disrupted at several stages
a. chromosomal; phenotypic b. phenotypic; chromosomal c. gonadal; chromosomal d. gonadal; genotypic e. phenotypic; gonadal