E&EB 122 - Lecture 1 - The Nature of Evolution: Selection, Inheritance, and History | Open Yale Courses
E&EB 122 - Lecture 1 - The Nature of Evolution: Selection, Inheritance, …
Jan 1, 2009
yale.edu
The diagram illustrates a simplified evolutionary tree (phylogenetic tree) showing the relationship between different groups of reptiles and birds, highlighting when eggs and chickens first appeared. Here’s a breakdown: 1. Eggs Already Existed: The arrow pointing to “Eggs already existed here” refers to the fact that egg-laying as a reproductive strategy originated long before chickens appeared. The amniotic egg, which has a protective shell, evolved in the common ancestor of reptiles and birds,
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The diagram illustrates a simplified evolutionary tree (phylogenetic tre…
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