For identifying organisms through key usually

Key' is a taxonomical aid used for the identification of organisms. Each statement in key is called a _________.

Key' is a taxonomical aid used for the identification of organisms. Each statement in key is called a _________.

Key' is a taxonomical aid used for the identification of organisms. Each statement in key is called a _________.

Key' is a taxonomical aid used for the identification of organisms. Each statement in key is called a _________.

In a food chain, the initial organism is usually :

Melting and boiling points of organic compounds are usually very low - Why?

Identify the above organism:-