True or false. If False , give the correct statement:
Blood is produced in the bone marrow.

True or false. If False , give the correct statement: All the waste products of the body are excreted through the circulatory system.

True or False. If false ,give the correct statement : Plasmodium is a parasite.

True or False. If False, give the correct statement. Air is a pure substance

True or False. If False, give the correct statement. Air is not compressible.

True or False - if false, give the correct statement : Sound is produced by vibrating bodies.

True or False - If false,give the correct statement : Milk is rich in calcium .

True ot False - If false give the correct statement : No energy is produced in anaerobic respiration .

True or False - if false give the correct statement : Sodium is a hard metal.

True or False. If false ,give the correct statement : Nostoc is used for fixing nitrogen.

State true or false. If false, give the correct statement. A ball of iron floats in mercury.