Exploring Evolution: The Journey of Natural Selection
Science
GCSE Foundation
14 questions
~28 mins
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A worksheet covering Evolution & Natural Selection for GCSE Foundation students.
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Exploring Evolution: The Journey of Natural Selection
Subject: ScienceGrade: GCSE Foundation
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Untitled Worksheet
Grade GCSE Foundation
A
Questions
Answer all questions. Show your working where appropriate.
1.
What is the definition of natural selection?
[2 marks]2.
Which of the following is NOT a mechanism of evolution?
[1 mark]AMutation
BGenetic Drift
CGravity
DNatural Selection
3.
True or False: Charles Darwin was the first to propose the theory of evolution.
[1 mark]4.
Explain why genetic variation is important in populations.
[2 marks]5.
Match the following terms to their definitions:
[3 marks]1. Adaptation
2. Survival of the fittest
3. Speciation
AA trait that increases an organism's fitness
BThe formation of new and distinct species
CThe continued existence of organisms best adapted to their environment
6.
Describe the process of natural selection in 4 steps.
[3 marks]1
2
3
4
5
7.
Calculate the change in allele frequency if the initial frequency is 0.6 and there is a selective advantage increasing it by 0.1. Use the formula: New Frequency = Initial Frequency + Selective Advantage.
[2 marks]8.
Fill in the blank: In the theory of evolution, ________ is the process by which organisms better adapted to their environment tend to survive and produce more offspring.
[1 mark]9.
True or False: Genetic drift has a greater effect in large populations than small populations.
[1 mark]10.
Discuss the impact of environmental changes on the process of natural selection. Provide examples to support your explanation.
[6 marks]11.
What role do mutations play in evolution?
[2 marks]12.
Choose the correct statement about evolution:
[1 mark]AEvolution occurs in individuals, not populations.
BEvolution is a gradual process that can lead to new species.
CAll mutations lead to beneficial adaptations.
DEvolution has a predetermined goal.
13.
How does the concept of 'survival of the fittest' relate to natural selection?
[3 marks]14.
Identify the primary factor that can lead to speciation.
[1 mark]AReproductive isolation
BIncreased mutation rate
CArtificial selection
DGene flow
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- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
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