The introduction of foreign species can cause a rapid decline of a native species
Answer:
study
Explanation:
if you don't study you won't learn
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.
Answer:
The testes are male reproductive glands that produce sperm and release hormone testosterone. Testosterone is the hormone responsible for development of secondary sexual characteristics. It is responsible for the growth of chest hair, deepening of the voice and muscle growth.
