Standard Books Botany Ecosystem Class 12 Questions

Bacteria and fungi in a forest ecosystem are generally

The food chain is a series of the population which starts with producers. It is concerned with

A food chain starts with

Mass of living matter at a trophic level in an area at any time is called

In a food web, each successive trophic level has

Despite occupying about 70 per cent of the surface, the productivity of the oceans are only ________

10% law of flow of energy in the ecosystem was proposed by

Energy enters into the ecosystem through

Which of the following is an artificial ecosystem

In a food chain, the total amount of living material is depicted by

The first link in any food chain is a green plant because

Generally, the food chain has how many trophic levels

The pyramid that cannot be inverted in a stable ecosystem, is pyramid of

The ecosystem has two components

The rate of formation of the new organic matter by a rabbit in a grassland is called

The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's

If 20 J of energy is trapped at the producer level, then how much energy will be available to peacock as food in the following chain Plant → Mice → Snake → Peacock

Humus undergoes decomposition at ______ rate and results ______

Which one of the following is not a functional unit of an ecosystem

The process of mineralization by microorganisms helps in the release of

The flow of energy among various trophic levels of an ecosystem is

Which of the following ecological pyramids is generally inverted

In a terrestrial ecosystem, the major conduit for energy flow the ______

The ________ is measured the mass of living organisms or the number in a unit area

Select the correct match

The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc., present in the soil at any given time, is referred to as the ________

For recycling of materials which one is most necessary