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Thwaites, G. H. K. in correspondent 
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From:
George Henry Kendrick Thwaites
To:
Charles Robert Darwin
Date:
[14 Feb 1860]
Source of text:
DAR 205.4: 100
Summary:

Questions how natural selection can explain why some cells remain simple and others are modified into highly complex structures.

Reports on the spread in Ceylon of a recently introduced plant.

Contributor:
Darwin Correspondence Project
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