This document contains the answers to a quiz about Darwin's theory of evolution and natural selection from the BBC Bitesize Science website. It provides the correct answers to 9 multiple choice questions testing understanding of key concepts such as how new species evolve through natural selection, which individuals are most likely to survive and reproduce, why genetic variation is inherited, and examples of how natural selection has acted on peppered moths and the horse fossil record. One answer is identified as incorrect, explaining that Lamarck's theory was discredited because it could not explain the continued existence of simple organisms on Earth.

1. 22/3/2017 BBC - GCSE Bitesize Science - Survival of the fittest (Higher Tier) : Answers
http://www.bbc.co.uk/bitesize/quiz/q40664761/answers 1/2
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Survival of the fittest (Higher Tier) - Answers
You scored 8 out of 9
According to Darwin's theory of evolution, how do new species evolve?
You said: By natural selection
Correct.
Which individuals are most likely to survive to reproduce?
You said: Individuals that are well suited to their environment
Correct.
What is likely to happen to an individual that is poorly suited to its environment?
You said: It will not survive to reproduce
Correct.
Why do we have a good evolutionary record of the horse?
You said: The fossil record of the ancestors of the horse is complete
Correct.
Which of these conditions is most likely to favour fossilisation?
You said: Low oxygen levels and cold.
Correct.
What sort of variation is inherited?
You said: Genetic variation
Correct.
Why are white peppered moths likely to be more common than black ones in country areas?
You said: White peppered moths are more difficult for birds to see on clean birch bark
Correct.
Which of the following is not likely to cause a species to become extinct?
You said: A new food source.
Correct.
Which is one of the reasons why Lamarck's theory of evolution was discredited?
You said: It suggested that aquired characteristics do not have a genetic basis.
Incorrect.
One of the reasons why Lamarck's theory of evolution was discredited is because it could not explain why simple organisms continue to
exist on Earth.
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2. 22/3/2017 BBC - GCSE Bitesize Science - Survival of the fittest (Higher Tier) : Answers
http://www.bbc.co.uk/bitesize/quiz/q40664761/answers 2/2
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