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  • 1(current)
Q. No.

Identify the correct statement:

1.  Eutrophic lakes contain fewer nutrients than oligotrophic lakes.
2.  Xerarch succession is a primary succession that occurs in water bodies.
3.  Most ecologists believe that most communities achieve stable, unchanging climax vegetation.
4.  A mature ecosystem has greater species richness, greater biomass, and less net productivity than a younger stage of succession.

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |

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The threat of extinction will be highest for:

1.  a very small population in an unstable environment
2.  a moderate-sized population of r strategists
3.  a large population with lots of genetic variabilities
4.  a moderate sized population in a stable environment

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
 78%

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Under a particular set of selection pressures, organisms evolve towards the most efficient:

1.Thermoregulation2.Water conservation
3.Respiration4.Reproduction strategy

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
 65%

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What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?

1.  It will grow normally
2.  It will grow well because it is planted in the same locality
3.  It may not survive because of changes in its microclimate
4.  It grows very well because the plant gets more sunlight

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) | Adaptations (OLD NCERT) |
 66%
From NCERT

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Populations and species of larger size are found in colder environments, while populations and species of smaller size are found in warmer regions. This is:

1.Allen’s rule2.Hesse’s rule
3.Allee effect4.Bergman’s rule

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |

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