Living Things change evolve

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Living Things change evolve
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Every one who is seriously involved in the
pursuit of science becomes convinced that a
spirit is manifest in the laws of the Universe-a
spirit vastly superior to that of man, and one in
the face of which we with our modest powers must
feel humble." Albert Einstein
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Population Group of organisms of the same
species that live in the same area
Ursus americanus
Ursus maritumus
Ursus arctos
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Some basic questions

• How is that we can have so many diverse
  populations of living things?
• How did these living things arise?
• Are they related?

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James Hutton 1785 Described geologic
processes of land formation
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Grand Tetons in Wyoming
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Mount Rainer - Washington
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Chales Lyell 1833 Geologic changes happened
slowly over periods of time
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Devastation for 150 square miles
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An example of ecological succession
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18 years later Primary Succession has occurred
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Jean Baptiste Lamark
French soldier and naturalist. 1744
1829 Environment gives rise to changes in
animals.
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Lamarck used his theory to explain the fidlers
crab claw and the long neck of the giraffe.
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Jean Baptiste Lamark
Lamark proposed that by selective use or
disuse of structures, organisms acquired or
or lost certain traits during a
life-time. Could these traits be passed to the
offspring?
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Troy Cox at age 3.
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Essay on the Principle of Population Predicted
that human population will grow faster than the
space and food supplies needed to sustain it.
Thomas Malthus 1798
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Charles Darwin
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Charles Darwins Journey
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Galapogos Islands
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Darwin looked at beaks of finches and talked
about natural variation
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Darwins Theory - Individual organisms differ
from one another.
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Organisms in nature produce more offspring than
can survive.
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Living things compete for resources
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Each organism has unique advantages and
disadvantages
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Organisms best suited are Selected Naturally and
survive and reproduce. Natural Selection
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Those that are not well suited for
their environment do not survive and reproduce.
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Species change over time
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He is also believed that all organisms are united
by a tree of life. Do you?
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Darwins Theory of Evolution

• Variation exists within a species
• All organisms compete for limited natural
  resources
• Organisms produce more offspring than can
  survive.
• The environment naturally selects organisms with
  beneficial traits.
• Species change and organisms are
• connected by a tree of life.

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Domains Kingdoms