After Every Twenty Presses on a Lever,a Rat Is Rewarded

question 67

Multiple Choice

After every twenty presses on a lever,a rat is rewarded with drops of water.This schedule is an example of a ____.

• A) fixed-ratio schedule
• B) fixed-interval schedule
• C) variable-interval schedule
• D) variable-ratio schedule

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Definitions:

Tissues

Groups of cells in an organism that have similar structure and function.

Biological Organization

A hierarchical structure that organizes different aspects of life, from atoms to biosphere, to study life's complexity and processes in an orderly manner.

Organ Systems

Groups of organs that work together to perform complex functions in an organism.

Ecosystem

A community of living organisms and their physical environment interacting as a system.