The principal decomposers of the biosphere are

The Ascaris, Entamoeba and Plasmodium are considered as examples of

Thunderstorms and lightning convert atmospheric nitrogen into

To enable the materials locked up in dead organisms, the main role is played by

Consumers that eat animal flesh, as well as plants and plant products, are called

The reservoir of gaseous nitrogen is classified as

The current level of urbanization in Pakistan is about

When the oxides of nitrogen (NO, NO₂) and sulfur (SO, SO₂, SO₃) interacts with water vapors then the acids produced are

The interactions between different species members are known as

The carbon dioxide (CO₂) taken by the producers from the atmosphere is converted into

The process of photosynthesis converts solar energy into the

Reproduction is a basic survival for

The network of food chains that are interconnected with each other at different trophic levels is called

The cyclic pathways through which materials move back from the environment to organisms and organisms to the environment are called

Pitcher plant, Sundew are common examples of

The carbon atom is the principal building block of many kinds of

Intergovernmental Panel on Climate Change (IPCC) was established in

Pakistan developed the National conservation strategy in

Predation helps to maintain balance in

The process of conversion of oxides of nitrogen into nitric acid and then into nitrates is classified as

The constant flow of energy is from producer to

The process of nitrates utilization by organisms is classified as

The law which states that energy is only transformed from one state into another and it is never destroyed nor created is called

The level at which an organism feeds in a food chain is called

Since 1800 the amount of carbon dioxide in the atmosphere has increased

The tertiary consumers that are fed on primary carnivores are also known as

The substances that cause pollution are

The group of consumers in an ecosystem includes

The fish aquarium is best classified as an example of

Considering the ecological organizations, the range between tops of the highest mountains and floor of oceans is classified as