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

question 12

Multiple Choice

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

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

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Definitions:

Observation Learning

A type of learning that occurs through observing the behaviors of others and the outcomes of those behaviors, without direct instruction.

Learning

The process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, or preferences through study, experience, or teaching.

Extinction

in behavior science, refers to the process by which a previously reinforced behavior is weakened by ceasing to provide reinforcement.

UCS

An abbreviation for Unconditioned Stimulus, a stimulus that naturally and automatically triggers a response without any prior conditioning in behavioral psychology.