The johnson family has three sons, billy, tommy, and bobby. billy is as old as tommy and bobby together. last year, tommy was twice as old as bobby was. in two years, billy will be twice as old as tommy is now. how old is each son?

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step-by-step explanation:

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.