There are ______ classes of antibody
A.
one
B.
three
C.
five
D.
seven
C
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What is the outcome of F+ X F- conjugation?
a. The F- cell receives a copy of the F factor and becomes an F+ cell. b. The F- cell receives a copy of the F factor but remains an F- cell. c. Chromosomal DNA is transferred from the F+ cell to the F- cell. d. Chromosomal DNA is transferred from the F- cell to the F+ cell. e. A genetic recombination of bacterial genes takes place.
The result of X inactivation is ____________________ between the sexes. Fill in the blank(s) with the appropriate word(s)
Information about mean arterial pressure is integrated within what area of the central nervous system?
A) cervical spinal cord B) hypothalamus C) cerebellum D) medulla oblongata E) pons
All of the following are true of biofuels EXCEPT
A) there is concern that using food products as a fuel source will reduce the global food supply and increase food prices. B) demand for biofuels has placed demands on rain-forest lands. C) these are fuels such as methane produced from renewable biological resources such as soybeans and corn. D) the goal of their use is to reduce harmful carbon dioxide emissions. E) biofuels are the only solution to our growing need for fuels in the future.