All organisms are made of four different types of carbon-based molecules. these four types of macromolecules include carbohydrates, proteins lipids, and which other type of molecule? a) nucleic acid b) water c) glucose

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred