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Answer:
Ans1) Nutrition, the assimilation by living organisms of food materials that enable them to grow, maintain themselves and reproduce. Food serves multiple functions in most living organisms. Food also provides materials from which all the structural and catalytic components of the living cell can be assembled.
Ans2) The role of chlorophyll in the lrocess of photosynthesis is to trap sunlight from the sun to prepare food.
Ans3) The conditions neccessary for photosynthesis are as follows :
1) Carbon dioxide (from air)
2) Chlorophyll (present in the leaf)
3) Water (from soil)
4) Energy (from sunlight).
Ans4) When a leaf is boiled in water which contains a bit alcohol then all the chlorophyll gets extracted. This process is called bleaching of leaf.
Ans5) a very small grey or yellow colour plant that spreads over the surface of rocks, walls and trees which does not have any flowers is called a lichen.
It is a stable symbiotic association between a fungus and algae and/or cyanobacteria. 5% algae and 95% of fungi both shows symbiosis un such a way that algae provides food to the fungi and fungi helps algae to provide the minerals and so they both associates together and they are called as lichen.
Ans6) when plants need nitrogen, absorbed ammonium is flushed out into soil solution where micro organisms convert it into nitrate form. Nitrates are then utilised (absorbed) by the plants. The remaining portion of the fertilizer, i.e., sulphate is left in the soil and increases acidity in the soil.
Explanation:
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