MCQ
Brain stem consists of
- AMedulla, pons, cerebellum
- BCerebellum, hypothalamus, mid brain
- ✓Pons, cerebellum, medulla and mid brain.
- D$A$ and $B$ both
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($i$) It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
($ii$) There are six ganglia lie in the thorax, and three in the abdomen.
($iii$) The sense organs are antennae, eyes, maxillary pulps, labial pulps and anal cerci etc.
($iv$) Each eye consists of about $5000$ hexagonal ommatidia.