Q. What is average pH of human blood?
1) 2.3
2) 1.3
3) 10.7
4) 7.4
Q. The minimum forest cover necessary to maintain ecological balance is -
1) 50% of the total land area
2) 40% of the total land area
3) 33% of the total land area
4) 25% of the total land area
Q. Photoperiodism affects -
1) Flowering
2) Vegetative growth
3) Fruiting
4) All of these
Q. Which of the following is FALSE with respect to rain water harvesting ?
1) It helps raising water table
2) It helps meet rising water demand
3) It increases run-off losses
4) It is a device of water conservation
Q. The maximum fixation of solar energy is done by -
1) Bacteria
2) Fungi
3) Green plants
4) Protozoa
Q. Animal milk protein is called first class protein because it is -
1) Delicious in taste
2) Cheaper in the market
3) Rich in essential amino acids
4) Easily digestible
Q. Outside the nucleus DNA is found in -
1) Mitochondria
2) Ribosome
3) Endoplasmic reticulum
4) Golgi bodies
Q. Which one of the following animals belongs to mollusca?
1) Hare
2) Hydra
3) Hyla
4) Haliotis
Q. Allantois of Embryo helps in -
1) Respiration
2) Excretion
3) Protection
4) Digestion
Q. The example of 'Lentic Habitat' in fresh water community is -
1) Ponds and swamps
2) Waterfalls and rivers
3) Ponds and rivers
4) All the above
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