Which one of the following is the correct description about the animal concerned?

Biology · Class 11 · CBSEStructural Organisation in Animals

Which one of the following is the correct description about the animal concerned?
  1. Smooth muscle - The fibres are fusiform and show striations
  2. Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
  3. Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
  4. Frog - Body divisible into three regions: head, neck and trunk

Answer

(B) Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)

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