10 questions🇬🇧English
🐦 Variation & Natural Selection – Year 9
Biology · Year 9 (KS3) — types of variation, Darwin's theory, peppered moths and how species change over time
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Questions
Which of these human features shows continuous variation?
Height
Blood group
Biological sex
Ability to roll your tongue
20s
Which of these features is caused only by the environment?
Your natural eye colour
Your height
A scar on your knee
Your blood group
20s
Which scientist wrote 'On the Origin of Species', published in 1859?
Isaac Newton
Gregor Mendel
Charles Darwin
Jean-Baptiste Lamarck
20s
Identical twins have the same genes but different body masses. What is the most likely cause of this difference?
Natural selection acting on each twin
Environmental factors such as diet and exercise
Different genes inherited from each parent
Different numbers of chromosomes
30s
What is the main purpose of a seed bank such as the Millennium Seed Bank?
To create new species by mixing seeds
To grow crops faster than in fields
To sell seeds to farmers at low prices
To preserve plant species in case they die out
20s
During the Industrial Revolution, dark peppered moths became more common near cities. Why?
Dark moths could fly away from pollution faster
Pale moths turned dark to hide from birds
Soot in the air dyed the moths' wings black
Soot darkened tree bark, so birds ate fewer dark moths
30s
In natural selection, which individuals are most likely to survive and pass on their genes?
Those that are the largest and strongest
Those that try hardest to change themselves
Those best adapted to their environment
Those that are the oldest in the population
20s
Finches on different Galápagos islands have different beak shapes. What is the best explanation?
Birds stretched their beaks to reach food
Food on each island reshaped the birds' beaks
Beaks best suited to the local food were selected
Each bird chose the beak shape it needed
30s
Why is the fossil record incomplete?
Fossils only form from animals, not plants
All fossils older than 1 million years have decayed
Soft-bodied organisms rarely form fossils
Fossils only form in very hot conditions
30s
Why is a species with very little genetic variation at greater risk of extinction?
Its genes mutate too quickly to stay stable
It always has fewer offspring than other species
Few individuals may survive a change, such as a new disease
Its individuals cannot reproduce with each other
30s