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Which set of features identifies a member of the class Insecta?
AFour pairs of legs and chelicerae
BThree pairs of legs and three body parts
CTwo pairs of antennae and a carapace
DTwo pairs of legs and one body part
Answer & Solution
Correct answer: B. Three pairs of legs and three body parts
1. Insects are defined by a consistent body plan.
2. They carry three pairs of walking legs and a body divided into three parts.
3. Many also carry wings, which no other arthropod class has.
4. Four pairs of legs with chelicerae identifies the Arachnida, the spiders and scorpions.
5. Two pairs of antennae identifies the Crustacea, so each option points to a different class.
_Source: NECTA CSEE 2022 Biology 033, Question 1: Multiple Choice Items, item (viii)_
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