KS3 Science Quiz - Variation and Classification 02 (Questions)

This KS3 Science quiz takes a second look at variation and classification. If variations are beneficial and help an animal or plant survive better in their habitat, the individuals with these variations will survive longer and have more offspring, ensuring the variation is passed on again. This is called the evolution of a species. Sometimes, after many generations, the variations that have been passed on mean that the new individuals are very different to the original organisms - a new species has evolved. This is how humans (Homo sapiens) arose from primates (apes, monkeys and early forms of human) that were living in Africa several millions of years ago.

The characteristics of a species are used to classify organisms. A characteristic is a feature such as the number of legs on an animal, or the number of sepals of a flower.

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Scientists always use several characteristics to define a species. Classification was first developed by a Swedish scientist, Carl Linnaeus. He collected and studied many plants and animals, describing their key characteristics in detail. He introduced the binomial (literally meaning 'two name') system where each plant and animal species is given a unique name like Homo sapiens or Panthera leo (lion).

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1. Which of the following is not an arthropod?
[ ] Arachnid
[ ] Crustacean
[ ] Insect
[ ] Mollusc
2. Which of the following has two body parts, four pairs of jointed legs and no wings?
[ ] Beetle
[ ] Crab
[ ] Spider
[ ] Woodlouse
3. Which of the following has an unsegmented body?
[ ] Ant
[ ] Snail
[ ] Wasp
[ ] Earthworm
4. How many legs do insects have?
[ ] 6
[ ] 4 pairs
[ ] 5 pairs
[ ] More than 10
5. Which is the odd one out?
[ ] Algae
[ ] Flowering plants
[ ] Fungi
[ ] Mosses
6. Which one of the following is found in water?
[ ] Algae
[ ] Conifers
[ ] Ferns
[ ] Mosses
7. Which is the odd one out?
[ ] Apple tree
[ ] Chestnut tree
[ ] Fir tree
[ ] Oak tree
8. Which is the odd one out?
[ ] Bluebell
[ ] Bracken
[ ] Grass
[ ] Snowdrop
9. Which is the odd one out?
[ ] Daisy
[ ] Dandelion
[ ] Grass
[ ] Moss
10. What do the following have in common - daffodil, grass and apple tree?
[ ] All produce pollen
[ ] No stems
[ ] Reproduce by spores
[ ] Simple leaves
KS3 Science Quiz - Variation and Classification 02 (Answers)
1. Which of the following is not an arthropod?
[ ] Arachnid
[ ] Crustacean
[ ] Insect
[x] Mollusc
Arthropods have legs, a mollusc is legless
2. Which of the following has two body parts, four pairs of jointed legs and no wings?
[ ] Beetle
[ ] Crab
[x] Spider
[ ] Woodlouse
Spiders are arachnids. Arachnophobia is a fear of spiders
3. Which of the following has an unsegmented body?
[ ] Ant
[x] Snail
[ ] Wasp
[ ] Earthworm
The others all have more than one body part: the ant and wasp are insects with three body parts - head, thorax and abdomen; the earthworm has a segmented body all the way along
4. How many legs do insects have?
[x] 6
[ ] 4 pairs
[ ] 5 pairs
[ ] More than 10
Anything with more or fewer legs is not an insect
5. Which is the odd one out?
[ ] Algae
[ ] Flowering plants
[x] Fungi
[ ] Mosses
Fungi have no chlorophyll, so are not green, and cannot make their own food
6. Which one of the following is found in water?
[x] Algae
[ ] Conifers
[ ] Ferns
[ ] Mosses
Algae have no roots, stems or leaves. Some mosses grow in very wet places like a bog but they float on top of the water
7. Which is the odd one out?
[ ] Apple tree
[ ] Chestnut tree
[x] Fir tree
[ ] Oak tree
A fir tree is a conifer, it has needle leaves and seeds in cones
8. Which is the odd one out?
[ ] Bluebell
[x] Bracken
[ ] Grass
[ ] Snowdrop
Bracken is a fern and reproduces by spores
9. Which is the odd one out?
[ ] Daisy
[ ] Dandelion
[ ] Grass
[x] Moss
Mosses have no roots and reproduce by spores
10. What do the following have in common - daffodil, grass and apple tree?
[x] All produce pollen
[ ] No stems
[ ] Reproduce by spores
[ ] Simple leaves
All hayfever sufferers should get this correct!