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The given figure represents head region of cockroach. In which one of the options all the four parts A, B, C and D are labelled correctly?
A B C D
Labrum Mandible Maxilla Labium
A B C D
Mandible Maxilla Labium Labrum
A B C D
Maxilla Labium Mandible Labrum
A B C D
Labium Maxilla Labrum Mandible
Answers (1)
As we learned
Mouth of cockroach -
1) Labrum (upper lips)-has epipharynx (chemo-receptors)
2) Mandibles (one pair)-bears teeth like processes called denticles
3) Maxillae-(one pair)-serve to hold particles, and have olfactory receptors.
4) Labium (lower lip) has tactile and gastatory sensory setae
5) Hyphopharynx-has sensory setae
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