Question

Answer the following questions.
2. How is the presence of starch tested in a food item?
3. Define winnowing. How is it done?
4. Explain with diagrams the two types of venations in leaves.​

Answer 1

Answer:

1.by bread potato

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Answer 2

Answer:

2) We can easily test the prewence of starch. Take small quantity of the food items to be tested. Put 2-3 drops of iodine solution on it. ... Blue-black colour indicates the presence of starch in the tested food item.

3)Winnowing usually follows threshing in grain preparation. In its simplest form it involves throwing the mixture into the air so that the wind blows away the lighter chaff, while the heavier grains fall back down for recovery.

4)The pattern in the arrangement of veins in the blade of a leaf is called as venation. Two types of venation are reticulate venation and parallel venation. ... Most of the monocot plants exhibit parallel venation in their leaves. e.g. Grains, banana, palm, onions, and grass etc.