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i) Since Shreya has more winding than Kabir which is 50 more than Kabir therefore the electromagnetic power in Shreya's screw will be more. more the number of winding, more will be the power of the electromagnet.
ii) ingestion----> digestion----->absorption------>assimilation----->egestion.
a) food is absorbed in the small intestine
b) the finger like structures are called Villi
iii) take a potted plant and keep it in and dark away from sunlight 3 days
then keep the plant facing the sunlight for 6 to 8 hours
the plant can now carry out photosynthesis produce starch
mark the green areas in the leaf and trace them on a sheet of paper. mark the regions as green and yellow
the green areas contain chlorophyll which is absent in the yellow areas
immerse the leaf in boiling alcohol to decolourise it. leave slowly loses its green colour which goes into the alcohol
dip this decolourise leaf in iodine solution. now remove the leaf from iodine solution and reason it in distilled water. remove the leaf from distilled water and keep it in a Petri dish
two colour regions are visible in the leaf
the green colour reasons on putting iodine turns blue black where is the yellow part became reddish brown this indicates the importance of chlorophyll in plants
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