air
Without water living things die, no matter what type of living thing they are.
Most aquatic animals use gills to extract oxygen from water. Through a process called gas exchange, they take in water containing dissolved oxygen, absorb the oxygen through their gills, and release carbon dioxide back into the water.
Dissolved oxygen (DO) is the amount of oxygen that is present in the water. Worms, fish, crabs and other underwater animals use gills to get oxygen from the water. Scientists generally agree that the underwater creatures need dissolved oxygen concentrations of 5.0 mg/L or more to live and thrive
Gills. Animals living in the water that do not come up for air use gills to breathe.
animals and plant use energy for living
All animals drink water for the same use as humans.
To show that a substance is dissolved in water in a chemical equation, you can use the symbol (aq) next to the chemical formula of the substance. This indicates that the substance is dissolved in water to form an aqueous solution. For example, NaCl(aq) represents sodium chloride dissolved in water.
You can use living organisms as combined. Since plants and animals both have life, living organisms can be used.
Why are you learning about this
Plants living in water have easy access to nutrients and do not need to invest energy in developing strong support structures. Water also helps to regulate temperature and provides buoyancy, reducing the risk of water loss and overheating. Additionally, aquatic plants can use dissolved carbon dioxide from the water for photosynthesis.
its used for animals to drink and for used to use for??
When water freezes especially in arctic and antarctic during winter, the fishes use the oxygen dissolved in the water for respiration and these fishes have anti- freeze in their bodies to prevent ther blood from freezing.