28 Oct 2021
Problem 14
Page 721
Section 27.2: Review Questions
Chapter 27: Introduction to Animal Diversity
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28 Oct 2021
Background and context
Earth was formed around 4.5 billion years ago. It showed several climatic changes favoring the origin and evolution of different living organisms. The appearance of different living organisms can be estimated by the fossil evidences which appeared during the geological timescale. Various data are available to know the evolution and existence of organism. Few of them are accurate whereas some shows wrong information about ancestry.
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