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16

The square root of 16 is (can be) both positive and negative, because -4^2 = 16, and 4^2 = 16.

Step-by-step explanation:

Since the both -4^2 and 4^2 equal 16, thinking of the sentence in converse allows us to say that the square root of 16 can both be positive (4) and negative (-4).

Hope this helps!

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.