What Did the Mass Extinction at the End of the Ordovician

question 21

Multiple Choice

What did the mass extinction at the end of the Ordovician set the stage for?

• A) more species to go extinct
• B) groups of organisms to diversify
• C) groups of organisms to withdraw from previous habitats
• D) groups of organisms to repopulate abandoned niches
• E) diversification and repopulation of abandoned niches

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Definitions:

Stimulus Events

External or internal occurrences that elicit responses from an organism or cognitive system.

Repetitive Stimulus

A stimulus presented repeatedly to a subject, often used in experiments to measure response habituation or sensitization.

Reward

A benefit or positive outcome provided to encourage a certain behavior or achievement.

Operant Conditioning Techniques

Behavioral training methods based on the principle of reinforcing desired behaviors and discouraging undesired ones.