31 Bacteria is usually classified as
Plant
32 Coronary arteries supply blood to the
Heart
33 Sound travels fastest in
Steel
34 A defence of the body against bacteria is
Phagocytes
35 An insect that is economically important because it carries pollen from flowers to flowers is
Bee
36 The tapeworm lives in the intestines of man as
A parasite
37 An adult may secrete
1 to 1.5 liters of saliva per day
38 A radio signal can travel around the Earth in about
1/7 second
39 The sky over Moon appears
Black
40 Tuberculosis affects
Lungs
