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Which one of the following is the true description about an animal concerned?

1. Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
2. Frog - Body divisible into three regions - head, neck and trunk
3. Rat - Left kidney is slightly higher in position than the right one
4. Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)

Correct answer: Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)

Solution

Cockroach has 10 pairs of spiracles: 2 pairs on the thorax and 8 pairs on the abdomen. The other statements are inaccurate because earthworm’s digestive parts are not listed in the correct order, frog body is not divided into three regions, and in rat the right kidney is slightly higher than the left.

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