61 Sulfa drugs may be effective against disease caused by

Bacteria

62 In a leaf the opening between two guard cells is known as

Stomata

63 Pyorrhoea is the disease of

The gums

64 Rickets and Scurvy are

Deficiency diseases

65 Bacteria are considered as the lowest member of which kingdom?

Plant Kingdom

66 Bacteria are

Both useful and harmful to life

67 Moon’s surface gravity is

One-sixth that of earth

68 Liver is concerned with which system of the body?

Digestive system of the body

69 Hygrometer is an instrument for

Measuring the relative humidity in air

70 Sericulture is

Art of silkworm breeding