What important role do unicellular organisms play in sustaining life on Earth?

Answer 1

Single celled lifeforms constitute most of the life on Earth. They are the majority of the producers in Earth's ecological system. They are major contributors to the processes that replenish our atmosphere, and form the basis of the marine food chain. On a smaller scale, single celled organisms perform equally important roles: they are a major part of the digestive system of most advanced animals. In humans, they are present in our intestines to aid in the breakdown of foodstuffs. Without them, we would not survive. Without single celled organisms, no life would be possible on Earth.

Answer 2

Some single celled organisms help us to digest our food, many single celled organisms cause infectious disease. Yeast is a single celled organism which is used for both brewing and baking. Single celled organisms play a major role in decomposition of organic matter which is a necessary part of the ecology.

Answer 3

because most oxygen we breathe is produced by one-celled algae that floats near the surfae of water

Answer 4

unicelluar organisms are imporatant because they play a role to sustain the earth and ourselves to survive

Answer 5

..... yeahh i hate science