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:

Energy Source

Any substance or system that can be utilized to produce energy or power, including fossil fuels, solar energy, wind energy, and nuclear power.

Fats

Macronutrients that provide energy, help in hormone production, and assist in the absorption of certain vitamins.

Daily Values

Nutritional benchmarks on food labels representing the recommended daily intake of various nutrients based on a 2,000 calorie diet.

Nutrient Context

The evaluation of foods and nutrients within the larger framework of the diet and its overall effects on health.