Ans. Carbohydrates, proteins, fats, vitamins and minerals are components of food. These components of food are called nutrients.
Ans. A green pigment present in all green plants which helps leaves to capture the energy of the sunlight is called chlorophyll.
Ans. Fungi grow on pickles, leather, clothes and other articles that are left in hot and humid weather for long time.
Ans. The fungal spores are generally present in the air. When they land on wet and warm things they germinate and grow.
Ans. They contain chlorophyll which gives them the green colour. Algae can also prepare their own food by photosynthesis.
Ans. Chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis.
Ans. Insectivorous plants got leaves therefore they can photosynthesis, which means they can prepare their food in the presence of sunlight.
Ans. We often see slimy, green patches in ponds or in other stagnant water bodies. These are generally formed by the growth of organisms called algae.
Ans. The food enables living organisms to build their bodies, to grow, to repair damaged parts of their bodies and provide the energy to carry out life processes.
Ans. Plants such as pitcher plant do not get all the required nutrients from the soil in which they grow because they are deficient in nutrients such as nitrogen.
Ans. Cuscuta is a parasitic plant. It is yellow tubular structures twining around the stem and branches. It does not have chlorophyll. It takes readymade food from the plant on which it is climbing.
Ans. The bacterium called Rhizobium present in leguminous plant can take atmospheric nitrogen and convert it into a soluble form. Thus help in nitrogen fixation.
Ans. The leaves other than green also have chlorophyll. The large amount of red, brown and other pigments mask the green colour. Photosynthesis takes place in these leaves also.
Ans. The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesis (prepare) food from carbon dioxide and water.
Ans. Iodine solution is used to test leaves for the presence of starch.
Test – Remove chlorophyll by boiling it in alcohol and then add 2 drops of iodine solution. If the color changes to blue, indicates the presence of starch in the leaves.
Ans. Water and minerals present in the soil are absorbed by the roots. Carbon dioxide from air is taken in through the tiny pores present on the surface of the leaves. The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight.
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