A Scientist Suspects That the Food in an Ecosystem May

question 46

Multiple Choice

A scientist suspects that the food in an ecosystem may have been contaminated with radioactive nitrogen over a period of months. Which of the following substances could be examined for radioactivity to test the hypothesis?

• A) the cell walls of plants growing in the ecosystem
• B) the hair produced by humans living in the ecosystem
• C) the sugars produced during photosynthesis by plants growing in the ecosystem
• D) the cholesterol in the cell membranes of organisms living in the ecosystem

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Definitions:

Promisor

The person who makes a promise or agreement to do something, especially in a contract.

Promisee

The person to whom a promise is made in a contract, who stands to benefit from its fulfillment.

Offeror

The party in a contract negotiation that proposes the terms of an agreement to another party, known as the offeree.

Uniform Commercial Code

A comprehensive set of laws governing commercial transactions in the United States, aimed at standardizing practices across states.