IB MYP Class 10 Sciences (Group 4) - Biology (Core Units and Skills) | Evolution and Natural Selection by Abraham | Learn Smarter
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Evolution and Natural Selection

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Sections

  • 1

    What Is Evolution?

    Evolution is the gradual change in inherited traits of organisms over generations, leading to diversity of life.

    Learning Practice

  • 1.1

    Definition

    Evolution refers to the gradual change in inherited traits of a population over successive generations, leading to new species and the extinction of others.

    Learning Practice

  • 1.2

    Historical Background

    The historical background of evolution highlights the foundational contributions of Charles Darwin and Alfred Russel Wallace in developing the theory of natural selection.

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  • 2

    Natural Selection: The Driving Force Of Evolution

    Natural selection is a key mechanism of evolution, explaining how certain traits become more prevalent in populations due to differential survival and reproduction.

    Learning Practice

  • 2.1

    Key Components Of Natural Selection

    Natural selection is a fundamental mechanism of evolution, driven by variation, inheritance, overproduction, and differential survival and reproduction.

    Learning Practice

  • 2.2

    Example: Peppered Moth (Biston Betularia)

    Learning

  • 3

    Genetic Variation And Mutation

    Genetic variation is essential for evolution, arising from mutations and other sources that contribute to diverse traits in populations.

    Learning Practice

  • 4

    Adaptation And Fitness

    Adaptation signifies traits that enhance an organism's survival and reproduction, while fitness measures an organism's capability to survive and reproduce in its environment.

    Learning Practice

  • 4.1

    Adaptation

    Adaptation is a key concept in evolution, explaining how organisms develop traits that enhance their survival and reproduction within their environments.

    Learning Practice

  • 4.2

    Fitness

    Fitness in the context of evolution refers to an organism's ability to survive and reproduce in its environment, influenced by adaptation and natural selection.

    Learning Practice

  • 5

    Speciation: Formation Of New Species

    Speciation is the process through which new species arise, facilitated by various types of barriers that prevent interbreeding.

    Learning Practice

  • 5.1

    How Does Speciation Occur?

    Speciation occurs through isolation and divergence, leading to the formation of new species.

    Learning Practice

  • 5.2

    Types Of Speciation

    This section describes the mechanisms and types of speciation, focusing on the processes of allopatric and sympatric speciation.

    Learning Practice

  • 6

    Evidence For Evolution

    The section discusses key evidence supporting the theory of evolution, including the fossil record, comparative anatomy, embryology, and molecular biology.

    Learning Practice

  • 6.1

    Fossil Record

    The fossil record provides crucial evidence for evolution, showcasing gradual changes in species over time.

    Learning Practice

  • 6.2

    Comparative Anatomy

    Comparative anatomy studies the similarities and differences in the anatomical structures of different species, providing evidence for evolutionary relationships.

    Learning Practice

  • 6.3

    Embryology

    Embryology studies the similarities in early development among different species, highlighting their common ancestry.

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  • 6.4

    Molecular Biology

    This section explores the intertwining of molecular biology with evolutionary concepts, focusing on how molecular evidence supports the theory of evolution.

    Learning Practice

  • 7

    Human Evolution (Brief Overview)

    This section provides an overview of human evolution, highlighting our common ancestry with primates and significant developments in our evolutionary history.

    Learning Practice

  • 8

    Artificial Selection Vs Natural Selection

    This section outlines the key differences between artificial selection, driven by human preferences, and natural selection, driven by environmental factors.

    Learning Practice

  • 8.1

    Feature Comparison

    This section explores the comparison between natural selection and artificial selection, detailing their driving forces, processes, and outcomes.

    Learning Practice

  • 9

    Evolution Today

    This section discusses ongoing evolution in response to environmental changes, focusing on antibiotic resistance, pesticide resistance, and the effects of climate change.

    Learning Practice

  • 9.1

    Examples Of Ongoing Evolution

    This section discusses contemporary examples of evolution in action, highlighting phenomena such as antibiotic resistance and pesticide resistance.

    Learning Practice

  • 10

    Summary

    This section reiterates the concept of evolution and its mechanisms, particularly natural selection, highlighting how it accounts for the diversity of life.

    Learning Practice

  • 11

    Key Terms

    This section outlines the fundamental terms related to evolution and natural selection.

    Learning Practice

  • 12

    Formative Activities

    This section covers formative activities designed to assess understanding of evolution and natural selection.

    Learning Practice

References

10 IB bio ch5.pdf

Class Notes

Memorization

Revision Tests