1
Which of the following statements are correct for lice?
(A) . They are wingless insects
(B) . Body is laterally compressed
(C) . Life cycle has complete metamorphosis.
(D) . They are very host-specific and site-specific
Choose the correct answer from the options given below:
EXPLANATION
Phthiraptera
- Analysis of Characteristics of Lice:
- Wingless Insects: True. All lice are secondarily wingless (apterous) obligate ectoparasites.
- Body Shape: False. The body of lice is dorso-ventrally flattened (flattened top-to-bottom), enabling them to glide between hairs/feathers. In contrast, fleas (Siphonaptera) are laterally compressed.
- Metamorphosis: False. Lice undergo gradual / incomplete metamorphosis (hemimetabolous): egg (nit) $\rightarrow$ nymphal instars $\rightarrow$ adult, without a pupal stage.
- Host and Site Specificity: True. Lice exhibit extreme host-specificity and anatomical microhabitat restriction.
- nalysis:
- Statements (A) and (D) are correct. Hence, Option 3 ((A) and (D) only) is correct.
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