BIO MOD 4

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10 Terms

1
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What are invertebrates?
Animals that lack a vertebral column (backbone).
2
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What percentage of animal species are invertebrates?
Over 95%.
3
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What is the largest phylum of invertebrates?
Arthropoda.
4
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What are key features of arthropods?
Exoskeleton
5
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What are the main insect body segments?
Head
6
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What are spiracles?
Small openings on the insect body for gas exchange.
7
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What is metamorphosis?
Developmental transformation from larva to adult.
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What is complete metamorphosis?
Life cycle with distinct stages: egg
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What is incomplete metamorphosis?
Life cycle with gradual changes: egg
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What role do invertebrates play in ecosystems?
Pollination