5+y= -15 how do you solve this problem

you already know the answer so you are trying to find what Y is. so if u have -15 then you subtract 5 and what's left is how much Y is worth. so Y is -20.

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.

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