Free Ecosystem (Daily Quiz: 10) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Ecosystem (Daily Quiz: 10) Time:

Question-1

Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

A single species may occupy more than one trophic level. In pond, fish occupy more than one trophic level. Small fishes act as secondary consumer. They feed on primary consumer. Large fishes act as tertiary consumer. They feed on smaller fish.


Question-2

Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.

ecosystem-class-xii-Chapter-14-neet-mcq-quiz-pdf

 ABCD
(a)Rock mineralsDetritusLitter fallProducers
(b)Litter fallProducersRock mineralsDetritus
(c)DetritusRock mineralsProducerLitter fall
(d)ProducersLitter fallRock mineralsDetritus

(a)

(b)

(c)

(d)


Question-3

The correct order of the process of decomposition is

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

Decomposition involves breakdown of complex organic matter by decomposer to inorganic raw materials like $CO_2$, water & various nutrients. It consists of the following processes:

Fragmentation : It is the formation of smaller pieces of dead organic matter or detritus by detritivores.

Catabolism : Chemical conversion of detritus into simpler inorganic substances with the help of bacterial and fungal enzymes is called catabolism.

Leaching : Water soluble substances (formed as a result of decomposition) are leached to deeper layers of soil.

Humification : If decomposition leads to the formation of colloidal organic matter (humus), the process is called humification.

Mineralization : Formation of simpler inorganic substances (like $CO_2$ , water and minerals) is termed mineralization.


Question-4

The unit of productivity is

(a)

(b)

(c)

(d)


Question-5

If the carbon atoms fixed by producers already have passed through three species, then the trophic level of the last species would be

(a)

(b)

(c)

(d)


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