All the biological macromolecules contain carbon, hydrogen and oxygen. However, most do not contain nitrogen. The category that contains nitrogen are

A) Lipids
B) Proteins
C) carbohydrates
D) unsaturated fats

If vegetable oil is made out of veggies, then what is baby oil made out of?

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms