Identify the possible link "A" in the following food chain:
Plant -> insect -> frog -> "A" -> Eagle

Which one of the following is not a gaseous biogeochemical cycle in ecosystem?

identify the correct type of food chain dead animal-> blow fly maggots->common frog->snake

In primary succession on rocks, the pioneer species are usually

In a polluted environment, the maximum pollutant will occur to

In an ecosystem, the cycling of nutrients is known as

Which of the ecological pyramid is always straight?

Nutrient enrichment of a lake will cause

Which of the following is an example of manmade ecosystem?

A progressive series of change in plant and animal life of an area from initial colonization is known as

Photochemical smog pollution does not contain

Which of the following is secondary pollutant?

Which one of the following statements pertaining to pollutants is correct?

More than 70% of world's fresh water is contained in

Identify the correct matched pair

Prolonged libral irrigation of agricultural fields is likely to create the problem of

The term 'Bio-magnification' refers to the

Bhopal gas tragedy 1984 was caused by the leakage of gas__

A lake with an inflow of domestic sewage rich in organic waste may result in

Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air born particles which lead to

Assertion (A) : In a terrestrial ecosystem, detritus food chain is a major conduict for energy flow.
Reason (R) : Solar energy is a direct source of energy supply in the detritus food chains.
(a) If both A and R are true and R is the correct explanation of the A
(b) If both A and R are true, but R is not the correct explanation of the A
(c) If A is true, but R is false
(d) If A is false, but R is true

Assertion (A) : The standing crop is measured as the mass of living organisms.
Reason (R) : It represents the entire living matter in a specific population at a particular time.
(a) If both A and R are true and R is the correct explanation of the A
(b) If both A and R are true, but R is not the correct explanation of the A
(c) If A is true, but R is false
(d) If A is false, but R is true

Assertion (A) : Decomposition process is slower if detritus is rich in lignin and cutin.
Reason (R) : Decomposition is largely an oxygen requiring process.
(a) If both A and R are true and R is the correct explanation of the A
(b) If both A and R are true, but R is not the correct explanation of the A
(c) If A is true, but R is false
(d) If A is false, but R is true

Assertion: Communities with more species tend to be more stable than those with less species.
Reason: Communities with more species is not able to resist occasional disturbances.
Codes:
(a) Both assertion and reason are true and reason is the correct explanation of assertion.
(b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Both assertion and reason are false.

Assertion: Species diversity decreases as we ascend towards high mountains.
Reason: Due to drop in temperature, no seasonal variability occurs in high mountains.
Codes:
(a) Both assertion and reason are true and reason is the correct explanation of assertion.
(b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Both assertion and reason are false.