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nmdcat.online July 14, 2026

A researcher wants to test Lamarckism by training rats to navigate a maze. According to Lamarckian theory, what should occur in successive generations of these trained rats?

A. Each successive generation should require fewer trials to learn the maze.
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B. Each successive generation should take longer to learn the maze due to mental fatigue.
C. No change should be observed in the learning rate across generations.
D. The rats will lose their spatial awareness completely.

📝 Explanation

Under Lamarckism, the mental training/acquired skill of navigating the maze would be passed to the offspring, making subsequent generations progressively better at it without training.

📖 Additional Information

  • Each successive generation should require fewer trials to learn the maze.
  • Each successive generation should take longer to learn the maze due to mental fatigue.
  • No change should be observed in the learning rate across generations.
  • The rats will lose their spatial awareness completely.

Under Lamarckism, the mental training/acquired skill of navigating the maze would be passed to the offspring, making subsequent generations progressively better at it without training.

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