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Question

Identify the correct combinations.
(a) Housefly-labellum-pseudotrachea
(b) Moth-labellum-Dutton's membrane
(c) Butterfly-first maxillae-galea
(d) Tsetse fly-rostrum-haustellum

A
a and b
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B
a and c
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C
b and c
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D
b and d
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Solution

The correct option is B a and c

(a) Flies with fused labella have food channels in the surface of the labella. These are called pseudotracheae.

(b) Dutton describes a fine membrane covering in the area between mosquito extended tongue and the base of the labellae.

(c) Butterflies have mouth parts specialized for probing into a flower and sucking out nectar. A long, slender proboscis is formed by the two galea of the maxillae which interlock to enclose a central food canal.

(d) In Tse-Tse fly, a pair of maxillary palps help to protect the more delicate proboscis or haustellum which lies between them when it is not in use.

So, the correct answer is 'a and c'.


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