What was the key difference between Haeckel's original tree of life and his later addition of the Monera kingdom?
Understand the Problem
The question is asking for the key difference between Haeckel's original tree of life and his later inclusion of the Monera kingdom, specifically which of the provided options accurately describes that difference.
Answer
Haeckel added Monera for unicellular organisms lacking a nucleus.
Initially, Haeckel's tree of life did not include the Monera kingdom, which he later added to account for unicellular organisms lacking a nucleus.
Answer for screen readers
Initially, Haeckel's tree of life did not include the Monera kingdom, which he later added to account for unicellular organisms lacking a nucleus.
More Information
Haeckel initially categorized life into three kingdoms: Plants, Animals, and Protists. The Monera kingdom was added later to account for simpler, unicellular organisms that lacked a defined nucleus, distinguishing them from the Protists.
Sources
- 1.1: A Systematic Approach - Biology LibreTexts - bio.libretexts.org
- 1.4: A Systematic Approach - Biology LibreTexts - bio.libretexts.org
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