Q11 of 38 Page 92

Normal body temperature of man is __________.

the normal body temperature of man is 98.6o F. It ranges between 98.4 – 98.6o F and is lowest in early morning hours while highest in late afternoon and evening hours.

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The tusks of elephants are modified ________.

 10

Pick out an animal which has a four-chambered stomach.

 12

Mitral valve is found between _________.

 13

Assertion (A): Mammalian heart is called myogenic heart.

Reason (R): Heartbeat is regulated by a specialized muscle bundle (pacemaker) in mammals.