Answer:
dinosaurs and birds
Explanation:
Dinosaurs and birds are considered as the most closely related species to one another because they are evolved from a common ancestor. They show resemblance in many ways such as physical structure, both dinosaurs and birds moves on two feets etc. In phylogenetic tree, dinosaurs and birds are the roots from which other organism evolved. So that's why dinosaurs and birds are considered the most closely related species living on earth.
Creating new, habitable land out of riverbeds
The symbol for carbohydrates is C.
An Organisms position within a food web is known as D. Trophic Level. Hope I could help!
Because they contain CARBON