The pyramid of numbers is inverted in the case of
The type of food chain in which organic matter decomposed is converted into energy rich compounds is called -
One of Eltonian pyramids have to be upright always -
Word 'ecosystem' was coined by -
Biotic components include -
The last organisms of the food chain are generally-
In an ecosystem, the population of -
An aquatic ecosystem consists of -
The best arrangement of an energy system consisting of hawks, snakes, mice and grasses is -
If a big fish eats small fish which eats Hydra who in turn eats water fleas ; water fleas in turn eat phytoplankton. In this chain, water fleas will be -
The graphic representation of trophic level is represented by a pyramid. Which of the following pyramid is always a true pyramid unlike the others ?
Which of the following constitutes the structure of an ecosystem ?
Ecosystem comprises both abiotic and biotic components. Biotic component of an ecosystem consists of -
Autotrophic organisms (green plants), which capture solar energy to synthesise organic food are called -
In a pyramid of numbers representing an ecosystem of a large freshwater pond the number of primary consumers is -
Food chain refers to -
The sequence of species through which theorganic molecules in community pass is called is -
A group of interconnected food chains is called -
The energy which is utilized by the living world is primarily -
Energy flow in ecosystem is -
The rate at which new tissues are formed in producers is the ecosystem's -
How much amount of light is used in the production process by plants ?
The importance of ecosystem maintenance lies in -
The amount of energy, utilized by herbivores from the plants is -
The percentage of net primary production of total light intake is -
The flow of materials and energy in an ecosystem is respectively -
Mark the incorrect statement with reference to carbon cycle -
Major reservior of carbon in biosphere is lies in -
Biogeochemical cycling means -
The least productive ecosystem is -
One of the following is sedimentary cycle ?
The primary consumers in a pond ecosystem is -
The number of primary producers within a specified area would be minimum in -
The river mouth ecosystem is called as -
In a natural ecosystem, decomposers include-
Which of the following is not true for man made ecosytems ?
Lotic ecosystem refers to -
The ecosystem of a pond is referred to as -
The correct sequence of components through which energy may pass from initial source, through an ecosystem is -
The major resorvior of phosphorous cycle is-
Efficiency of any ecosystem is best depicted by pyramid of -
The correct match is -
The first trophic level in any kind of food chain is always a green plant because -
The creating force of an any ecosystem is -
When frog eats grasshopper which thrives on green plants, the frog is -
The largest ecosystem in the world is contributed by -
If the primary producers are absent from any ecosystem which of the following will occur ?
Grasshopper in grassland is a -
The pyramid of number for forest ecosystem is -
They can be put in the category of primary consumers -
The study of fresh water ecology is -
The place where fresh water joins the salt water is called as -
The word standing crop in ecosystem refers to -
The pyramid of energy in any ecosystem is-
Which of the following organisms can convert ammonium or nitrates into amino acids ?
The pyramid of energy in a food chain is:
The decomposers in an ecosystem constitute the following trophic level -
If all the green plants were to disappear from the earth -
The bacteria which attack the dead animals are -
The number of producers and consumers in an ecosystem is mutually controlled by a -
The non-green plants are as important as the green plants because they -
The ecosystem of earth is known as -
In any given ecosystem, the number of individuals of a species remain more or less constant over a period of time. This constancy of numbers is maintained by -
The ecosystem exists in a state of 'balance'. Supposing one of the heterotrophs, says the rabbit, multiplies and increases in number suddenly then -
Which of the following is not characteristic of a ecosystem -
The amount of living matter present in acomponent population of a particular trophic level is called as -
Which of the following is the smallest unit ?
The term reducer is applied to -
In a parasitic food chain which trophic level is represented by bugs and lices ?
The pyramid of number in a forest ecosystem is -
The pyramid of biomass in a parasitic ecosystem is -
The pyramid of biomass in a shallow pond ecosystem is -
The cybernetic of an ecosystem refers to -
The gross production minus respiration losses by plants in an ecosystem is indicated as-
The biotic and abiotic components of the ecosystem are connected through -
The rate of storage at consumer level is -
The CO2 is returned to the atmosphere by-
A group of interacting living things and all the environmental factors with which they interact are together called -
An ecosystem does not normally alter because it is in a state of -
The immediate surroundings of an organism are called -
Raymond Lindmann (1942) used the term trophic level. Trophic levels are formed by -
Organisms which acquire energy and nutrients by digesting the organic molecules of living organisms are called -
Which of the following is the trophic level of man in an ecosystem ?
The rate at which new tissues are formed in producers is called the primary net productivity of the ecosystem. About how much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores ?
Net community productivity (NCP) is the -
A food chain consists of -
The herbivores that feed directly on producers are called -
Within the ecosystem, energy is transferred from organism to organism in the form of -
The rate at which light energy is converted to chemical energy of organic molecules is the ecosystem's -
Producers in an ecosystem are -