Ques. What is common in whale, bat and rat?
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
Answer:B
Ques. What is common in whale, bat and rat?
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