Question 1 Medium
Which domain contains plants and animals?
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Answer: Eukaryota
- Their cells have a nucleus.
- It is Eukaryota.
Classification and evolutionary trees: GCSE Combined Science Biology practice questions
A second set of questions on classification and evolutionary trees. They are different from the ones on the topic page. Try each, then open the answer and compare your working.
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Question 2 Medium
What does a branching point on an evolutionary tree represent?
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Answer: a common ancestor
- Two groups split from it.
- It is a common ancestor.
Question 3 Medium
The scientific name of the domestic cat is Felis catus. Give the species name.
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Answer: catus
- The species is the second word.
- The species name is catus.
Question 4 Medium
What word describes organisms whose cells have a nucleus?
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Answer: eukaryotes
- Eukaryota is the domain.
- The organisms are eukaryotes.
Question 5 Hard
Which group is bigger, a genus or a family?
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Answer: family
- A family contains genera.
- So a family is bigger.
Question 6 Hard
Give one type of evidence used to build an evolutionary tree.
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Answer: fossils
- Scientists compare organisms.
- Fossils and DNA are used.
Question 7 Hard
Which domain contains single-celled organisms with no nucleus that live in hot springs?
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Answer: Archaea
- They live in extreme places.
- They are Archaea.
Question 8 Hard
The scientific name of the dog is Canis familiaris. Give the genus.
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Answer: Canis
- The first word is the genus.
- It is Canis.
Quick checks
Short questions with options. Choose one before you open the answer.
Check 1
What is classification?
Show answer
Sorting living things into groups.
Check 2
Who developed the system of classification into groups?
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Carl Linnaeus.
Check 3
List the Linnaean groups from largest to smallest.
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Kingdom, phylum, class, order, family, genus, species.
Check 4
What is a binomial name?
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A two-part Latin name made of the genus and the species.
Check 5
What is the binomial name for humans?
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Homo sapiens.
Check 6
Why is the binomial system useful?
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Scientists around the world can identify an organism without confusion.
Check 7
What does the genus name begin with?
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A capital letter.
Check 8
Why has the classification system changed?
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Better microscopes and chemical analysis gave new evidence.
Check 9
Who proposed the three-domain system?
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Carl Woese.
Check 10
Name the three domains.
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Archaea, Bacteria and Eukaryota.
Check 11
What are Archaea?
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Single-celled organisms with no nucleus, often found in extreme places such as hot springs.
Check 12
What does Eukaryota include?
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Protists, fungi, plants and animals.
Check 13
What is an evolutionary tree?
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A diagram that shows how organisms are related through common ancestors.
Check 14
What does a branching point on a tree show?
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A common ancestor.
Check 15
How do you tell which organisms are most closely related on a tree?
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They share the most recent common ancestor.
Check 16
What evidence is used to make evolutionary trees?
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Fossils and DNA analysis.
Check 17
What does binomial mean?
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Two names.
Check 18
What is a species?
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A group of similar organisms that can breed to produce fertile offspring.
Check 19
What does fertile mean?
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Able to have young of their own.
Check 20
Why are a horse and a donkey different species?
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Their offspring, a mule, is infertile.
Check 21
What is a domain?
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A very large group of living things, above the kingdoms.
Check 22
What does a Latin name help scientists avoid?
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Confusion caused by common names that differ between languages.
Check 23
Which is the smallest group in the Linnaean system?
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Species.
Check 24
Which is the biggest group in the Linnaean system?
Show answer
Kingdom.
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