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Lecture

Chapter 22: Evolution (Lecture 1 Notes)

4 Pages
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Department
Biological Sciences
Course Code
BIOA02H3
Professor
Dr.Persaud

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BIOA02: Dr. K. Persaud
Lecture #17 (Video)
Chapter 22: Mechanisms of Evolution
Mechanisms of Evolution
Charles Darwin was the first to formulize evolution, without the use of genes, etc
oHe was interested in the world around him, he loved nature, exploring, and
looking at the biological systems around him (plants and animals)
oHe wanted to have time to himself to explore the world around him
oHe was asked to be a ship HMS Beigels naturalist: someone who knew about
nature and would document what the nature of the place they went to
oHe made records of what he saw and observed
oThey stopped at the Galapagos Islands each island differs slightly in terms
of species (form) and plants etc
oClassic example of his arrangement: beak of the finch differed from island to
island, but same species
oHe hypothesized that there was one main ancestor, but over tmie they became
different because the islands were different (in terms of vegetation and
structure)
oHe didnt know the mechanisms of change, but he knew they existed
oLater on during the years he came up with natural selection
A controversial book came out by Thomas Malthus which scripted that he could
calculate the human population exponentially
oSome things keep up in check and under control disease, famine, etc 
necessary for human growth
oArtificial selection: people knew that they could reproduce certain traits by
mating selection
oVariation in populationdifferent individuals with different traits
www.notesolution.com

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Description
BIOA02: Dr. K. Persaud Lecture #17 (Video) Chapter 22: Mechanisms of Evolution Mechanisms of Evolution Charles Darwin was the first to formulize evolution, without the use of genes, etc o He was interested in the world around him, he loved nature, exploring, and looking at the biological systems around him (plants and animals) o He wanted to have time to himself to explore the world around him o He was asked to be a ship HMS Beigels naturalist: someone who knew about nature and would document what the nature of the place they went to o He made records of what he saw and observed o They stopped at the Galapagos Islands each island differs slightly in terms of species (form) and plants etc o Classic example of his arrangement: beak of the finch differed from island to island, but same species o He hypothesized that there was one main ancestor, but over tmie they became different because the islands were different (in terms of vegetation and structure) o He didnt know the mechanisms of change, but he knew they existed o Later on during the years he came up with natural selection A controversial book came out by Thomas Malthus which scripted that he could calculate the human population exponentially o Some things keep up in check and under control disease, famine, etc necessary for human growth o Artificial selection: people knew that they could reproduce certain traits by mating selection o Variation in populationdifferent individuals with different traits www.notesolution.com
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