Which of the Following Is the Best Evidence for a Three-

question 17

Multiple Choice

Which of the following is the best evidence for a three- domain system?

• A) There are three distinctly different types of nuclei.
• B) Some bacteria live in extreme environments.
• C) There are three distinctly different Gram reactions.
• D) There are three distinctly different sets of metabolic reactions.
• E) Nucleotide sequences in ribosomal RNA vary between all three domains.

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Definitions:

Exporter

An individual or company that sells goods or services to another country.

Domestic Consumers

People or families in a nation buying products and services for their own consumption.

Silk

A natural protein fiber, obtained from the cocoons of silkworms, used in the textile industry for making luxurious fabrics.

Trade

The act of buying, selling, or exchanging goods and services between parties within or across national borders.