Eco system practice · Mixed difficulty

Energy stored at the consumer level is

Lion is kept under in Eltonian pyramid as

Assertion: Phosphorus cycle does not involve microorganisms.
Reason: Microorganisms are mainly associated with nitrogen cycle.

Aerenchyma is helpful in plants by

In xerarch succession the pioneer species is?

How many statements are correct w.r.t. ecological succession?

a. Climax community is most stable $\&$ shows more niche specialisation.

b. Lichen and fungi are examples of climax communities

c. Hydarch succession leads to mesic condition.

d. Xerarch succession leads to very wet condition.

The NPP in a plant is 100Kj. What is the body mass of the secondary carnivore?

Which of the following ecological pyramids can never occur in an inverted from

Assertion: Sedimentary nutrient cycles of phosphorus, calcium, magnesium etc. are considered as imperfect cycles.
Reason: These cycles caused by local disturbances get more easily disrupted as the bulk of material remains in the relatively inactive and immobile reservoir on the earth's crust.

These belong to the category of primary consumers.

The pymarid which is always upright is

Assertion: In terrestrial ecosystem, a large amount of energy passes through detritus food chain.

Reason: Energy for detritus food chain comes from sun.

In ecological succession the communities in near equilibrium with the environment, are called

Autotrophs

The mosses which form dense extensive mats on the soil prevents:

Father of ecology in India?

In comparative study of grasslands and pond ecosystem

Edaphic nutrient cycles include

Trophic level of food chain having greatest amount of energy, is

Assertion: Primary productivity is shown by green plants only.

Reason: Primary productivity is also shown by chemosynthesizers.

True/False I. The total organic matter synthesised by the producers in the process of photosynthesis per unit time and area is known as gross primary productivity II. Net primary productivity is the weight of the organic matter stored by the producers in a unit area/volume per unit time

Assertion: In a food chain, members of successive higher levels are fewer in number.
Reason: Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.

Maximum primary productivity of pond is achieved by

What type of ecological pyramid would be obtained with the following data ?
Secondary consumer: $\mathrm{120}\,\,\mathrm{g}$
Primary consumer: $\mathrm{60}\,\,\mathrm{g}$
Primary producer: $\mathrm{10}\,\,\mathrm{g}$

Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem?

Organisms that breakdown the detritus into matter particles are

Consider the following statements
I. Producer are also called as transducers because they are able to change radiant energy into chemical form
II. Consumers are animals, which feed on other organisms or their parts
III. Decomposers are saprotrophs, which feed on dead bodies of organisms
Which of the statements given above are correct?

The detritus food chain

Which of the following pair is a gaseous type of biogeochemical cycle?

Driving force of any ecosystem is