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Earn 100

Keystone species deserve protection because these
(a)are capable of surviving in harsh environmental conditions
(b)indicate presence of certain minerals in the soil
(c)have become rare due to overexploitation
(d)play an important role in supporting other species

50% studentsanswered this correctly
Important Questions on Biodiversity and Conservation
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Statement II: The number of species per unit area is called species richness.

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Speciation is generally a function of time
Tropical environment is less seasonal, relatively more constant and predictable
Solar energy contributes to high productivity
Temperate regions have remained relatively undisturbed for millions of years.

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Match for and with the species-area relationship shown in the graphic representation below and choose the correct option.

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With reference to temperature adaptations, identify of the following graph

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Observe the following graph of regulators
In the above graph I, II and III represent

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Column I | Column II | ||
i) | Rivets | a) | Ecosystem |
ii) | Aeroplane | b) | Species |
iii) | Popping of a rivet | c) | Key species |
iv) | Rivets on the wings | d) | Proper functioning of ecosystem |
v) | Flight safety | e) | A species to become extinct |

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Match the following:
List - 1 | List -2 | ||
Carbon monoxide | Global warming | ||
Carbon dioxide | UV - rays | ||
Sulphur dioxide | Eutrophication | ||
Ozone depletion | Acid rain | ||
Oxygen transport |
The correct match is

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