1) How many legs does an insect have? a) 4 b) 6 c) 3 d) 2 2) What is an exoskeleton? a) a backbone b) a type of invertebrate c) external skeleton d) a type of vertebrate 3) What group does a snail belong to? a) Molluscs b) Arachnids c) Crustaceans d) Myriapods 4) Which of these is a crustacean? a) spider b) Crab c) snail d) centipede 5) How many body parts does an arachnid have? a) 2 b) 3 c) 1 d) many 6) Many legs does a spider have? a) 5 b) 6 c) 8 d) 4 7) What is the main difference between a slug and a snail? a) one has legs b) one has more than two antannae c) one has a shell d) one lives in water

Invertebrates

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選項

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