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Questions and Answers
What distinguishes insects from non-insect hexapods?
What distinguishes insects from non-insect hexapods?
- Presence of well-developed wings
- Size variation
- Position of mouthparts (correct)
- Number of legs
What is a unique feature of insect body structure?
What is a unique feature of insect body structure?
- Lack of wings in all species
- Enormous variation in body structure (correct)
- Limited ecological niche occupation
- Consistent body size across all species
Which group of arthropods includes non-insect hexapods?
Which group of arthropods includes non-insect hexapods?
- Protura, Diplura, and Collembola (correct)
- Arachnida
- Myriapoda
- Crustacea
What separates insects from other arthropods?
What separates insects from other arthropods?
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What ecological niche cannot be occupied by insects?
What ecological niche cannot be occupied by insects?
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Study Notes
Distinguishing Characteristics of Insects
- Insects are distinguished from non-insect hexapods by having a three-part body (head, thorax, and abdomen) and a hard exoskeleton made of chitin.
Unique Feature of Insect Body Structure
- A unique feature of insect body structure is the three-part body (head, thorax, and abdomen) with a hard exoskeleton made of chitin.
Non-Insect Hexapods
- Non-insect hexapods belong to the group of arthropods called Entognatha, which includes proturans, collembolans, and diplurans.
Distinguishing Insects from Other Arthropods
- Insects are separated from other arthropods by having a three-part body (head, thorax, and abdomen) and a hard exoskeleton made of chitin.
Ecological Niche Occupation
- Insects are unable to occupy an ecological niche that requires a large body size, as they have a hard exoskeleton that restricts their growth.
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