Due to the linneaus system of classification scientist were able to identify organism name , group via standardized system . They have found similarities in the organism like DNA / RNA ( genetic composition), embryonic development etc . so that they can study a organism completely . With the help of this system of classification scientist were able to give a particular name to a organism which is standardrized in the whole universe. It makes easier to all to identify an organism , otherwise different places have different name for a particular species.
Decomposition - bacteria helps to decompose dead organism , it's also used in food production
The total amount of oxygen in the ecosystem,light available, and sugar molecules would decrease.
I think the answer for this Question is DNA
