________ are a set of standards a person uses to measure the worth or importance of someone or something.

What makes a biological safety cabinet different from a vertical laminar flow hood?

A) As air approaches work surface, it is pulled through vents at front, back and sides of the unit. B) As air approaches work surface, it is pulled through vents at front and back of the unit. C) Air passes through a HEPA filter and is directed down toward the work surface. D) The work environment and the drug are protected from the potential contamination, but the worker is not.

Adult guinea pigs:

A)have long legs B)are short and stocky in build C)have three toes on their forefeet D)have four toes on their hind feet