Ecosystems

The term ecosystem was coined by:

(Out of current syllabus — rationalised out of NCERT; included as it was asked in earlier NEET papers) Which of the following would appear as the pioneer organisms on bare rocks?

Which of the following statements is not correct?

Which ecosystem has the maximum biomass?

What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g; Primary consumer : 60 g; Primary producer : 10 g

Which of the following ecological pyramids is generally inverted?

Match the trophic levels (grassland ecosystem) in Column I with the correct species in Column II: Column I (a) First trophic level (b) Second trophic level (c) Third trophic level (d) Fourth trophic level Column II (i) Crow (ii) Vulture (iii) Rabbit (iv) Grass Select the correct option:

In relation to gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

In the equation GPP - R = NPP R represents

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

Detritivores breakdown detritus into smaller particles. This process is called:

(Out of current syllabus — rationalised out of NCERT; included as it was asked in earlier NEET papers) Which one of the following will accelerate phosphorus cycle?

Given below are two statements: Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statement II: Decomposition is faster if the detritus is rich in lignin and chitin In the light of the above statements, choose the correct answer from the options given below

In the equation GPP − R − NPP, GPP is Gross Primary Productivity, NPP is Net Primary Productivity, R here is ______.

Identify the correct statements: A. Detritivores perform fragmentation. B. The humus is further degraded by some microbes during mineralisation. C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. D. The detritus food chain begins with living organisms. E. Earthworms break down detritus into smaller particles by a process called catabolism. Choose the correct answer from the options given below:

The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :

(Out of current syllabus — rationalised out of NCERT; included as it was asked in earlier NEET papers) Match List-I with List-II: List-I (A) Hydrarch succession (B) Xerarch succession (C) Ecological succession (D) Secondary succession List-II (I) Gradual change in the species composition (II) Faster and climax reached quickly (III) Lichens to mesic conditions (IV) Phytoplankton to mesic conditions Choose the correct answer from the options given below:

In an ecosystem if the Net primary Productivity (NPP) of first trophic level is 100x kcal m⁻² yr⁻¹, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?

Given below are two statements: Statement I: In an ecosystem, there is a unidirectional flow of energy from the sun through producers to consumers. Statement II: Ecosystems are exempted from the 2nd law of thermodynamics. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following is the unit of productivity of an Ecosystem?

Which of the following are primary consumers in a food chain?

Match List I with List II: List-I A. Decomposition B. Detritus C. Mineralisation D. Humification List-II I. Accumulation of dark coloured amorphous colloidal substance II. Release of inorganic nutrients by the activity of microbes in soil III. Breaking down of complex organic matter into inorganic substances. IV. Dead remains of plants and animals including fecal matter Choose the correct answer from the options given below:

Which of the following statements are correct? (a) Energy flow from producers to consumers is unidirectional; (b) Energy pyramid can never be inverted; (c) Transfer of energy follows the 1% law.

Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:

Match List I with List II : List I A. Productivity B. Net primary productivity C. Gross primary productivity D. Secondary productivity List II I. Gross primary productivity minus respiration losses II. Rate of formation of new organic matter by consumers III. Rate of biomass production IV. Rate of production of organic matter during photosynthesis Choose the correct answer from the options given below :