Home
Class 12
BIOLOGY
Which of the following is an ecosystem s...

Which of the following is an ecosystem service provided by a natural ecosystem?
1. Cycling of nutrients
2. Prevention of soil erosion
3. Pollutant absorption and reduction of the threat of gloobal warming
4. All of the above

A

Cycling of nutrients

B

Prevention of soil erosion

C

Pollutant absorption and reduction of the threat of gloobal warming

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
The products of ecosystem processes which have environmental, aesthetic and indirect economic value are named as ecosystem services. Soil formation and soil protection are the major ecosystem services accounting for nearly 50 % of theirtotal worth. Plant cover prodtects the soil from drastic changes in temperature. There is little wind or water erosion as soil particles are not exposed to them. The soil remains spongy and fertile. There are no landslides and no floods. Plant cover of natural ecosystem absorbs polluting gases, causes settling of suspended particulate matter, removes `CO_(2)` and releases `O_(2)`. Purified air becomes available. There is no overall depletion of nutrients as the same are repeatedly circulated and recirculated. This keeps the fertility of soil intact.
Promotional Banner

Similar Questions

Explore conceptually related problems

The given diagram represents the relationships between organisms in a remote pond ecosystem. From this information. Which of the following is the most likely to be correct? 1) DDT present in the ecosystem would accumulate to the highest concentrations in the tissues of detritivore 1. 2) The introduction of consumer 4 individuals from an external population would lead a temporary increase in number of producer 2. 3) Disease in the producer 1 population would lead to an increase in the producer 3 population. 4) Extermination of consumer 3 would cause a sustained increase in the population of consumer 2.

Among the following biogeochemical cycles, which one does not have losses due to respiration? 1. Phosphorus 2. Nitrogen 3. Sulphur 4. All of the above

Memebers of Phycomycetes are found in (i) aquatic habitats (ii) on decaying wood (iii) moist and damp places (iv) as obligate parasites on plants. Choose from the following options.1.None of the above, 2.(i) and (iv), 3.(ii) and (iii), 4.All of the above

Given : 1 = Natural selection , 2 = Variations and their inheritance , 3 = Survival of the fittest , 4 = struggle for existence According the Darwinism, which of the following represents the correct squence of events in the origin of new species ? (a) 3,4,1,2 (b) 2,3,1,4 (c) 1,2,3,4 (d) 4,2,3,1

Fruit shape in shephered purse (Capsella bursa) is of two types-triangular and top-shaped. Triangular fruit shape (T) is dominant over top-shape (t). Following table summarises the results of several crosses. {:("Cross","Result"),("Strain 1" xx "tt","All triangular"),("Strain 2" xx "tt","1 triangular : 1 top-shaped"),("strain 3"xx "tt","All top-shaped"),("Strain 4"xx "Tt","3 triangular : 1 top-shaped"):} Which pair of strains possess the genotyoe Tt ?