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Questions and Answers
What is the characteristic that describes Arachnids having four pairs of walking legs?
What is the characteristic that describes Arachnids having four pairs of walking legs?
- Two pairs of walking legs
- Fours pairs of walking legs (correct)
- No walking legs
- Six pairs of walking legs
Which statement about Arachnids is true regarding their body structure?
Which statement about Arachnids is true regarding their body structure?
- They have a cephalothorax instead of a separate head and thorax (correct)
- They have multiple thoraxes
- They have only a head
- They have a separate head and thorax
Arachnids usually have four pairs of simple eyes.
Arachnids usually have four pairs of simple eyes.
True (A)
Arachnids have antennae.
Arachnids have antennae.
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How do Arachnids respire?
How do Arachnids respire?
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Study Notes
Characteristics of Class Arachnida
- Possess four pairs of walking legs, totaling eight legs for locomotion and various functions.
- Exhibit a cephalothorax, a fusion of the head and thorax into one body segment, simplifying body structure.
- Typically have four pairs of simple eyes, which provide basic vision capabilities.
- Lack antennae, distinguishing them from other arthropods such as insects.
- Respiration is facilitated through specialized organs called "book lungs," allowing efficient gas exchange.
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