The Decline of Brachiopods and Stalked Crinoids, Which Began During

question 7

Multiple Choice

The decline of brachiopods and stalked crinoids, which began during Cretaceous, was probably the result of

• A) hiding in the crevasses in coral reefs during the day and only coming out at night.
• B) diversification of modern predators, including crabs, fishes, and snails.
• C) the ability to swim or to burrow actively as a defense against predation.
• D) defensive spines or unusually heavy protective shells.

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Definitions:

Statute

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A bill or proposed law that has been approved by both houses of a legislative body and is awaiting further action, such as executive approval, to become law.

Nash Equilibrium

Nash Equilibrium is a concept in game theory where each participant's strategy is optimal considering the strategies of other participants, implying no player has anything to gain by changing only their own strategy.

Prisoners' Dilemma

A scenario in game theory where two individuals acting in their own self-interest do not achieve the optimal outcome.