Biology: Adaptation and Mutations
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Questions and Answers

What is the primary purpose of adaptations in living things?

  • To survive in their habitats (correct)
  • To evolve into a different kingdom
  • To create a new species
  • To develop new features for show
  • What is the result of a negative mutation?

  • A disadvantage or a disease occurs (correct)
  • A beneficial trait develops
  • The DNA sequence remains unchanged
  • A new species forms
  • What is the main idea behind Darwin's theory of natural selection?

  • Variations are inherited from parents
  • Individuals with successful variations produce more offspring (correct)
  • All living things are identical
  • Environment determines the traits of an organism
  • What is an example of a neutral mutation?

    <p>The white fur of the Kermode (Spirit) bear</p> Signup and view all the answers

    What is the purpose of an African elephant's large ears?

    <p>To keep cool in a hot habitat</p> Signup and view all the answers

    What is the title of Charles Darwin's book about his theory of natural selection?

    <p>On the Origin of Species</p> Signup and view all the answers

    What is an example of an adaptation in plants?

    <p>A cactus's shallow roots and water-storing stem</p> Signup and view all the answers

    What is an example of an adaptive beak in finches?

    <p>A strong and sturdy beak with a chisel-like tip for drilling holes in wood</p> Signup and view all the answers

    Study Notes

    Adaptation for Survival

    • Living things develop special features or adapt to their habitats over time to survive.
    • Examples of adaptations include: • African elephant's large ears to keep cool in hot habitats. • Polar bear's thick fur to keep warm in cold habitats. • Cactus's shallow roots and water-storing stem to survive in desert environments.

    Mutations

    • Mutations are permanent changes in the DNA sequence.
    • They can be: • Neutral, having no effect on the organism. • Positive, providing an advantage. • Negative, causing a disadvantage.
    • Environmental factors like radiation and chemicals can increase the rate of mutation.
    • Examples of mutations include: • Plants developing resistance to bacterial and fungal infections (positive mutation). • Cancer, caused by mutations in genes that regulate the cell cycle (negative mutation). • White fur of the Kermode (Spirit) bear, which is usually black (neutral mutation).

    Theory of Natural Selection

    • Evolution is explained by Darwin's theory of natural selection.
    • The theory focuses on how variations benefit individuals to survive environmental changes, predation, or competition.
    • Individuals with successful variations produce more offspring, passing the variation on to the next generation.
    • This process allows the population to evolve with the successful variation.

    Darwin's Discoveries

    • Charles Darwin published "On the Origin of Species" in 1859, explaining his theory of natural selection.
    • Darwin's theory shows how all living things are connected in a family tree that stretches back billions of years to the beginning of life on Earth.
    • One of Darwin's discoveries was the identification of fourteen different species of Finches in the Galapagos Islands, each with adaptive beaks for their eating habits.
    • Examples of adaptive beaks include: • Strong and sturdy beaks with a chisel-like tip for drilling holes in wood (woodpecker). • Shorter, stouter beaks for eating seeds found on the ground. • Long, pointed beaks for picking seeds out of cactus fruits.

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    Description

    This quiz covers the concept of adaptation in living organisms and its importance for survival. It also touches on mutations and their effects on the DNA sequence. Test your knowledge of these biological concepts!

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