61 When we feel headache, it means that

Something is gone wrong to the nervous system

62 Most of the domesticated animals such as cats, dogs and bulls are

Colour blind

63 A fish is

A cold-blooded creature

64 How does a snake move?

With the help of its underside scales

65 How does a honeybee communicate to other bees about the discovery of nectar-giving flowers and pollen which can be converted into honey?

Through various kinds of dances

66 If there were no mulberry trees there would be no

Silk

67 Which bird egg is the largest?

Ostrich

68 An Ostrich egg is composed of

Single cell

69 Dinosaurs were living on earth

About 60 to 180 million years ago

70 Dinosaurs were

Cold-blooded reptiles