Which of the Following Would Be an Expendable

question 32

Multiple Choice

Which of the following would be an expendable?

• A)copier paper
• B)pens
• C)envelopes
• D)all of the above

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Definitions:

Chemical Barrier

A chemical barrier refers to a mechanism of defense provided by the secretion of chemicals that deter pathogens or predators.

Pathogens

microorganisms that cause diseases in their hosts.

Foreign Substance

Any material or substance that is not naturally part of an object or body and may be harmful or benign.

Disease-causing Agent

An organism or substance that is capable of producing disease, such as bacteria, viruses, or toxins.