1: Which of the following is not a seed-borne disease?
(a) Brown leaf spot of rice
(b) Black arm of cotton
(c) Red rot of sugarcane
(d) Potato mosaic
2: How dehydration helps in the preservation of food?
(a) Growth of micro-organism is checked
(b) Nutrients are concentrated
(c) Surface of food stuffs becomes hard
(d) Chemical reactions stop in the absence of water
3: What is done to raise the dough while making bread?
(a) Alcohol is added
(b) Yeast is added
(c) Carbon dioxide is passed
(d) Air is passed
4: How the body temperature is maintained?
(a) Due to temperature regulating mechanism located in the base of the brain
(b) Due to excessive intake of water
(c) Due to regular intake of foods
(d) Due to the constant flow of blood in the capillaries
5: Why the countries are scared to import fruits?
(a) Because they become rotton easily and spread diseases
(b) Because they are not easily adjustable to new climate
(c) Because insects carried through fruits are dangerous
(d) All of the above