Which one of the following is an artificial ecosystem?

Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called

Which of the following is included in edaphic factors?

Which of the following is not included in a freshwater ecosystem?

Select the mismatched pair in the following and correct it.
$(a)$ Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain
$(b)$ Ecosystem — Biotic components of environment
$(c)$ Aquarium — $A$ man-made ecosystem
$(d)$ Parasites — Organisms which obtain food from other living organisms

The decomposers in an ecosystem