Continents are land masses that exist on the surface of the earth. The continents are part of the uppermost layer of the earth which is called the crust.
The answer would be C. Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.
Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.
Answer:
Due to the presence of suitable environment.
Explanation:
Suitable environmental conditions are responsible for the presence of large amount of species in water bodies because suitable environmental conditions provides necessary materials for the growth and survival of organisms. The marine environment that have sufficient amount of food, space, optimum temperature, pH and salt concentrations so in this environment more number of species are present due to increase in population as compared to those ecosystem having harsh environmental conditions.
