Why do organisms need to take food ?

Why do orgaanisms need water ?

Why do organisms need water?

Which of the organism is used as food ?

[A] : In a food chain , membrane of successive higher levels are fewer in number . [R] : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level .

Why do atoms combine?

Converters or transducer organisms in the food chain are called