Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.
(4) produce new varieties of domestic animals
Although (1) (2) and (3) are modern-day uses of selective breeding, they are relatively recent developments in human history, only used for the past century or less. (4) is correct because the selective breeding of domestic animals to produce new varieties of dogs, cats, etc. has been used for thousands of years, dating back to the ancient Chinese and Egyptian dynasties.
Answer:
Starch is made up of a mixture of amylopectin and amylose and is the stored form of sugar in plants. Monosaccharides are simple sugars whereas cellulose and starch are not. Cellulose and starch contain many sugars and are polysaccharides. Also, lipids are not carbohydrates.
Explanation:
