Edexcel A-Level Psychology 9PS0
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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.
How might aggression have been adaptive for defending territory?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Define evolution.
Model answer
The process by which species change over successive generations through inherited variations.
- 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
How might aggression have been adaptive for defending territory?
Model answer
Aggressive behaviour could protect valuable land or resources from intruders.
- 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
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
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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