The horizontal transfer process known as transduction
A. involves a virus.
B. requires a pilus.
C. requires a cell to be "competent."
D. requires a plasmid.
E. involves a mutagen.
Answer: A
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The inner cell mass of the blastula forms:
A. a bilaminar embryo consisting of the epiblast and the hypoblast. B. a trilaminar embryo consisting of the epiblast, the mesoblast, and the hypoblast. C. a gastrula consisting of a trilaminar embryo. D. a trilaminar embryo consisting of ectoderm, endoderm, and mesoderm. E. a bilaminar gastrula consisting of the epiblast and the hypoblast.
________ chromosomes pair during ________ of meiosis.
Fill in the blank(s) with the appropriate word(s).
The first organisms to adapt to life in intertidal zones were probably ____
a. plants b. cyanobacteria c. green algae d. fungi e. animals
What cells produce antibodies?
A. B/Plasma cells B. Dendritic Cells C. Fibroblasts D. Neutrophils E. T cells