Which is a carbohydrate?

polysaccharide
nucleotide
nucleic acid
amino acid

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

Which correctly describes crossing over ?

Which of the following statements accurately describe work being done