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Biological Psychology

Evolution and natural selection

  • 2 things to know
  • Papers 1 and 3

Overview

Recall questions on natural selection and adaptation, the evolutionary account of aggression, sex differences, and why such accounts are hard to falsify.

What you need to know

Answer each one before you reveal it.

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Key term

Define evolution.

Key term

How might aggression have been adaptive for defending territory?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Define evolution.

    Model answer

    The process by which species change over successive generations through inherited variations.

  2. 2

    What is natural selection?

    Model answer

    The mechanism of evolution whereby individuals with traits that enhance survival and reproduction are more likely to pass on their genes to the next generation.

  3. 3

    How might aggression have been adaptive for defending territory?

    Model answer

    Aggressive behaviour could protect valuable land or resources from intruders.

  4. 4

    How does an evolutionary account explain human aggression?

    Model answer

    Aggression that secured resources, status and mates would have raised reproductive success, so a disposition towards it was selected for.

  5. 5

    What is meant by an evolutionary adaptation?

    Model answer

    A characteristic that spread through a population because it solved a recurrent problem of survival or reproduction.

  6. 6

    Give one criticism of evolutionary explanations of behaviour.

    Model answer

    They are post-hoc: a plausible adaptive story can be told for almost any behaviour, and such accounts are hard to falsify.

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In Rutter's study of Romanian orphans, children adopted before 6 months showed normal development.
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