Evolution
Published on Nov 23, 2015
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PRESENTATION OUTLINE
Definition:
Natural selection is the process through which a species changes into an organism that will survive better in the environment.
Photo by Paulo Brandão
HOW IT HAPPENS
- Two groups of a species are isolated
- When a species overproduced in order for more offspring to survive it leads to variation, a difference with no benefit
- Some variation may be helpful in the living environment which is called adaptation
- The organisms that adapt are more suitable to live while the others die
- When the organisms come back together they might be different species
Photo by Paulo Brandão
OVERPRODUCTION
WHEN A SPECIES PRODUCES MORE OFFSPRING THAN ARE CAPABLE OF LIVING
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EVOLUTION IS A SCIENTIFIC THEORY
- Has lots of supporting evidence
- May be able to change if new evidence is found
Photo by Paulo Brandão
SIMILAR STRUCTURE
SIMILAR STRUCTURES IN DIFFERENT SPECIES SHOWS THEY HAVE COMMON ANCESTORS
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ARM STRUCTURES
SOME ANIMALS HAVE SIMILAR ARM STRUCTURES SHOWING THEY HAVE COMMON ANCESTORS
Photo by Paulo Brandão
DOGS
OVER TIME HUMANS HAVE TURNED A SIMPLE WOLF INTO THOUSANDS OF TYPES OF DOGS
Photo by Paulo Brandão
