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BIO NMDCAT Lamarckism
nmdcat.online July 14, 2026

In the context of Lamarck’s theory, what is meant by the French term “besoin”?

A. The physical struggle for survival against other species
B. An inner physiological need or urge driven by environmental changes
✓
C. The genetic drive to undergo random mutations
D. The geographical isolation of a population

📝 Explanation

"Besoin" refers to the inner need or urge felt by an organism when faced with environmental change, prompting it to alter its behavior and use certain organs more than others.

📖 Additional Information

  • The physical struggle for survival against other species
  • An inner physiological need or urge driven by environmental changes
  • The genetic drive to undergo random mutations
  • The geographical isolation of a population

"Besoin" refers to the inner need or urge felt by an organism when faced with environmental change, prompting it to alter its behavior and use certain organs more than others.

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Lamarck published his major evolutionary ideas in his famous book "Philosophie Zoologique". In which year was this foundational text published?

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