Sir: Plants absorb dissolved nitrates from soil and convert them into :
1) Free nitrogen
2) Urea
3) Proteins
4) Ammonia
Plants synthesis protein from
1) Starch
2) Sugar
3) Fatty acids
4) Amino acids
Photosynthesis generally takes place in which parts of the plant?
1) Steam and leaf
2) Leaf and other chloroplast bearing plants
3) Bark and leaf
4) Roots and chloroplast bearing plants
Sir: The disease caused by deficiency of protein in children is called
1) Pellagra
2) Marasmus
3) Beri-Beri
4) Rickets
Plants receive their nutrients mainly from ?
1) atmosphere
2) chlorophyll
3) light
4) soil
What is Pollination ?
1) germination of pollen grains
2) growth of pollen tube in ovule
3) transfer of pollen from anther to stigma
4) visiting flowers by insects Which of the following explains the reason why there is no total eclipse of the sun?

1) Size of the earth in relation to that of moon

2) Orbit of moon around earth

3) Direction of rotation of earth around sun

4) Area of the sun covered by the moon
Which of the following layers make radio transmission possible?

1) Troposphere

2) Ionosphere

3) Mesosphere

4) Stratospher
Orbital period of the planet Mercury around the sun is:

1) 88 days

2) 365 days

3) 2 years

4) 98 days
Which of the following is most elastic ?

1) Steel

2) Rubber

3) Glass

4) Sponge
Bronze is an alloy of:

1) Copper and Zinc

2) Tin and Zinc

3) Copper and Tin

4) Iron and Zinc
Sir: Hygrometer is used for measuring the:

1) Speed of sound

2) Density of milk

3) Humidity of air

4) Specific gravity of liquids
Dry ice is:

1) Methane hydrate

2) Liquid Nitrogen

3) Solid Carbon dioxide

4) Frozen Water​