A genomic library is a collection of:
a. plasmid fragments that are spliced into DNA.
b. DNA fragments that are spliced into plasmids.
c. intron fragments that are spliced into plasmids.
d. exon fragments that are spliced into bacterial cells.
e. gene fragments that are spliced into main bacterial chromosom
B
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In 1987, 18 black-footed ferrets, the last known individuals of this species, were captured and brought into a captive breeding program in Wyoming. In 1989, the total ferret population, still in captivity, was 120 animals
These 120 animals in 1989 represented: A. N, the total population size. B. N, the change in population size from 1987 to 1989. C. N/t, the rate of change in population size. D. r, the per capita change in population size. E. rN, the geometric rate of growth of the population.
Cartilage that forms at the end of long bones and functions to allow bones to slide past each other during movement is called ________
A) elastic B) fibrocartilage C) bone D) hyaline
You discover a new species of bacteria that grows in aquatic environments with high salt levels. While studying these bacteria, you note that their internal environment is similar to the salt concentrations in their surroundings
You also discover that the internal salt concentrations of the bacteria change as the salt concentration in their environment changes. The new species can tolerate small changes in this way, but dies from large changes because it has no mechanism for altering its own internal salt levels. What type of homeostatic mechanism is this species using to regulate its internal salt levels? A) conformation B) regulation C) integration D) assimilation
Why does blockage of the coronary artieries often lead to a heart attack?
What will be an ideal response?