Animal Kingdom Question 139
139. What is common in Whale, Bat and Rat?
[1993]
(a) Absence of neck
(b) Muscular diaphragm between thorax and abdomen
(c) Extra-abdominal testes to avoid high temperature of body
(d) Presence of external ears
Show Answer
Answer : b
Hints & Solutions
(b) Diaphragm is present in mammals as a muscular seperator between thorax and abdominal region.