Question

13. Why do farmers grow many fruits and vegetable crops inside large green houses? What are the advantages to the farmers? Extended Learning — Activities and Projects 1. Project Take a potted plant with broad leaves. Take two strips of black paper and cut out a small square in the centres. Cover a part of two leaves with these papers and secure them with paper clips (Fig. 1.9). Keep the plant in sunlight for 2–5 days. Observe the difference in the colour of the covered and the uncovered portions on the leaf. Perform iodine test on this leaf. Did the two parts show different results? Now take second leaf. Remove the strip and expose the covered part to the sunlight for 2–3 days and do the iodine test again. Describe your observations. 2. Visit a green house if there is one near your place. Observe how they grow plants. Find out how they regulate the amount of light, water and carbon dioxide to grow the plants. 3. Try growing a sweet potato just in water. Describe your experiment and observations. You can read more on the following website: www.phschool.com/science/biology_place/biocoach/photosynth/ overview.htm Fig. 1.9 Experiment to test the occurrence of photosynthesis Did you know? Light

Answer 1

Answer:

I don't know if you know please write

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Answer 2

Answer:

farmers grow several plants in green houses as multiple plantasare able to maximise the heat in the greenhouse.unless on the commercial scale,common armers grow small amounts of produce for themselves.

Activity ans-the 2 parts will show different results,the part of leaf uncovered of the black strip will turn blue-black,denouncing the prescense of starch from photosynthesis

there would be no difference in the stripcovered part

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Explanation: