I believe its marine & freshwater ecosystems
Aerial, and Aquatic
what are the two main systems in a plant
the two major river systems are the Amazon and the Parana.
Capitalism, socialism, and communism are major economic systems.
it rains
what are the two main systems in a plant
Plankton
Two effects that chemical pollution can have on aquatic animals are that the animal could die from poisons. The second effect that chemical pollution has on aquatic animals is that if the chemicals don't poison them the animals have problems reproducing.
Enterprise-wide knowledge management systems and knowledge work systems
POLLUTION!
Oxygen can enter aquatic systems through diffusion from the atmosphere at the water's surface. Aquatic plants and algae also produce oxygen through photosynthesis, contributing to the oxygen levels in the water. Additionally, oxygen can also be introduced into aquatic systems through mixing with air during wave action or through aeration systems.
sorry i don't know