Q. Which one of the following is the true description about an animal concerned?
A) Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
B) Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
C) Frog - Body divisible into three regions - head, neck and trunk
D) Rat - Left kidney is slightly higher in position than the right one
Explanation
[Solution from source] The cockroach has 10 pairs of spiracles, 2 on the thorax and 8 on the abdomen. In earthworm the gizzard comes before the stomach, the frog has no neck (only head and trunk), and in rat the right kidney lies slightly higher than the left. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.