1. What factors are essential for photosynthesis to take place?
2. How does an insectivorous plant absorb nutrients from an insect trapped by it?
3. Why is nitrogenous fertilizer not added in soil in which leguminous plants are grown?
4. How does a saprophyte digest its food?
Answers
1. What factors are essential for photosynthesis to take place
ans. The four factors required for photosynthesis to take place are chlorophyll, water, sunlight and carbon dioxide. Photosynthesis is the process where green plants use light from the sun to create foods from water and carbon dioxide.
2. HOW DOES AN INSECTIVOUROUS PLANT ABSORB NUTRIENTS FROM AN INSECT TRAPPED BY IT
ANS. Insectivorous plants trap the insects that land on them and digest them for phosphorus and nitrogen. The plant then uses its digestive juices to absorb the insect's soft side into it and then discards the hard shell body of insect when finished.
3. WHY IS NITROGENOUS FERTILIZER NOT ADDED IN SOIL IN WHICH LEGUMINOUS PLANTS ARE GROWN
ANS. Nitrogenous fertiliser is not added in soil in which leguminous plants are grown because the nitrogen fixing bacteria reside in the root nodules of the leguminous plants. ... Hence the soil in which legumes are grown becomes rich in nitrogen and does not require nitrogenous fertilsers
4. HOW DOES A SAPROPHYTE DIGEST ITS FOOD
ANS. They obtain nutrients from dead and decaying matter. The saprophytes secrete digestive juices on dead and decaying matter and convert it into a solution. They then absorb the nutrients from it. In this way, they digest their own food and derive nutrients from it