Arachnids are arthropods with

A. Three pairs of legs and no antennae as adults
B. Four pairs of legs and no antennae as adults
C. Three pairs of legs and antennae as adults
D. Four pairs of legs and antennae as adults
E. None of the above


B

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Americans consume animal products at every meal

Indicate whether the statement is true or false

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Which of the following processes are most apt to encourage good soil aeration?

A) creation of more macropores B) root respiration C) organic matter decomposition D) diffusion of oxygen from the soil to the atmosphere E) reaction of oxygen with organic matter

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A free electron is one that

A) is in the valence band B) has no negative charge C) is not bound to any particular atom D) has a positive charge

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How many flip-flops are required to make a counter which counts from 0 to 5?

A) 2 B) 3 C) 4 D) 5

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