Shigellosis can be differentiated from salmonellosis by the fact that Shigella
A) stimulates intestinal epithelial cells to phagocytize it.
B) multiplies in phagocytic vesicles.
C) kills host cells.
D) multiplies in the host cell's cytosol.
E) causes severe diarrhea, abdominal cramps, and fever.
D
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Which of the following is a correct difference between a gene (genomic) library and a gene clone? A gene (genomic) library _____
A) contains many different DNA sequences; a gene clone contains one type of DNA sequence B) contains one type of cloned DNA sequence; a gene clone contains many different DNA sequences C) is a much longer DNA sequence than a gene clone D) is a much shorter DNA sequence than a gene clone E) is sequence information stored in a computerized database; a gene clone is an actual sequence of DNA
What is the role of actin in eukaryotic cells?
A. It forms the centromere that holds sister chromatids together. B. It forms the spindle that pulls chromosomes apart. C. It is necessary for the DNA to replicate. D. It provides strength in stretching and compression of a cell. E. It forms the structures inside flagella that allow the bending motion for cell motion (swimming).
Observable functional or physical traits are the
a. phenotype. b. allelotype. c. homotype. d. heterotype. e. genotype.
Compare and contrast the roles of cell division and morphogenesis in the development of an animal. What will be an ideal response?