Ecology Test - 3

The ecological niche describes how an organism or population responds to the distribution of resources and competitors, and how it in turn alters those same factors.

An aquarium survives on dissolved oxygen content and fishes form dominating organisms in this ecosystem. Each living (fishes, fungal plants, etc.,) and non living organisms (sand, water) in this man made ecosystem interact closely with each other and the change in ones\' content significantly affects other.

Abiotic factors are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems. Oxygen is an abiotic factor that supports other living organisms.

A biome is a formation of plants and animals that have common characteristics due to similar climate and can be found over a range of continents.

DDT accumulates inside the body of any organism as it passes through the food chain. It is an example of biological magnification.

Respiration is defined as the movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction.

The conversion of ammonia into usable form Nitrate is called Nitrification.