1.3 Biodiversity and Evolution

• Biodiversity and Evolution
• Population

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  • is a group of living things within a certain area that are all of the same species.
• Community

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  • is a group of association of populations of two or more different species occupying the same geographical area at the same time.
• Species

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  • is a group of organisms that may interbreed and produce offspring that is also capable of reproducing the same kind.
• Threatened species

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  • a particular species that declines so fast that it becomes endangered.
• Endangered species

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  • a particular species that when its population has become so low that it is possible of becoming extinct.
• Example of Endangered species

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  • Visayan Warty Pig

  • Philippine Eagle

  • Tamaraw

  • Tarsier
• Extinction

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  • is the disappearance of a species when the last of its members die. Change to habitats can threaten organisms with extinction.
• Example of Extinct animals in the Philippines

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  • Cebu Warty Pig

  • Tiger

  • Asian Elephant

  • Palawan Fossil Sirenia
• 2 Types of Extinction

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  • Background Extinction

  • Mass Extinction
• Background Extinction

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  • which is a natural part of evolution
• Mass Extinction

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  • which typically means some form of catastrophic event (such a volcano eruption or an asteroid hitting the Earth) has decimated plant and animal life.
• Causes of Extinction

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  • Destruction of Habitat

  • Unrestricted Hunting Activities

  • Climate Change

  • Asteroids / Cosmic Radiation