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Answer
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| Fill in the missing words about cestodes
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A cestode (tapeworm) is a chain (strobila) of progressively maturing reproductive units called proglottids anchored at one end to the intestinal wall by a hold-fast organ called the scolex.
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| What are halteres?
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- Reduced pair of wings
- Used for balance
- Possessed by diperan flies
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| What are spiracles?
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- Chitinous openings
- On the side of the body
- Under muscular control so can open and close at will
- Mounted on stimatic plates
- Leads to trachea
- Can be used for species identification
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| What is the name of the general insect body system?
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| What are oviparous insects?
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- Lay eggs outside of the body which hatch after deposition
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| What are viviparous insects?
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- Lay larvae or nymphs
- Eggs rupture in female reproductive system
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| Summarise simple metamorphosis and give an example of a species of insect which uses it
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- Nymph emerges from egg
- Nymph grows and moults
- Nymph becomes an adult
- Lice
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| Summarise complex metamorphosis and give an example of a species of insect which uses it
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- Larva emerges from egg
- Larva grows and moults
- Larva pupates
- Adult emerges from pupa
- Flies
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