Dinosaurs, because they are extinct so it is impossible to determine if two individuals could have produced fertile offspring (biological species concept). Instead, scientists have to use morphological differences to determine species.
Answer:
the plant's population will increase as now it has an abundance of sunlight because all the trees blocking it got cut down.
Explanation:
Answer:
Humans have a heart with two atria and two ventricles that pushes blood in one direction. Some animals have hearts similar to humans but, other animals have only one atrium and one ventricle or a cardiovascular system that can push blood in two directions.