A crop that protects the soil when summer annuals such as corn and soybean are not present is called a ____________________ crop
Fill in the blank(s) with correct word
cover
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The phase of the estrous cycle when the corpus luteum is highly functional is:
A. proestrus B. estrus C. diestrus
Which of these is NOT a characteristic of the gasoline engines that are used in hybrid vehicles?
A) Has a smaller than usual displacement B) A low viscosity oil is used C) Uses the electric motor to start the engine D) Has a larger than usual displacement
The master cylinder makes use of the principles of ____________________ to increase the driver's pedal effort.
Fill in the blank(s) with the appropriate word(s).
A switch controls the flow of electricity by:
A) Breaking the circuit when it is turned off. B) Modulating the current to a low level when it is turned off. C) Adding resistance to the circuit when it is turned off. D) Using up all the electricity when it is turned off.