An F? donor includes F DNA plus a segment of bacterial chromosome DNA. If conjugation is interrupted before the entire F? chromosome transfers, what could be the expected consequences?
A) integration of some but not all F? genes into the recipient's chromosome
B) a smaller F? plasmid than had been present in the donor
C) failure of the F? strand to circularize in the recipient
D) change of the recipient from F– to F+
E) formation of a recipient that is a stable partial diploid
C
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A farmer in Kansas and a farmer in California each plant an acre of the same kind of corn. Because the environment differs for each field, how will this affect the height of their corn?
A. The average height of the corn could differ between fields. B. The variation in the height of the corn in each field could differ between fields. C. The color and seed shape of the corn could differ between fields. D. Both the average height of the corn and the variation in corn height within each field could differ between fields. E. Average height, variation in height, seed color, and seed shape could all differ between fields.
Which of the following is not a major class of growth factors?
A. Nucleic acids B. Amino acids C. Purines and pyrimidines D. Vitamins
The cell wall
a. provides physical support for plant cells. b. controls the transport of materials out of the cell. c. replaces the plasma membrane in plant cells. d. is found in all eukaryotes. e. prevents the transport of toxic substances into the plant cells
Which one of the following is the correct classification of vertebrae, from the skull to the pelvis?
A) sacral, coccygeal, lumbar, thoracic, cervical B) cervical, thoracic, lumbar, coccygeal, sacral C) cervical, thoracic, lumbar, sacral, coccygeal D) coccygeal, thoracic, lumbar, sacral, cervical E) coccygeal, thoracic, lumbar, cervical, sacral