The salt concentration [measured as salinity in parts per thousand] for inland waters is:
1. Less than 5
2. Between 5 and 15
3. 30 – 35
4. More than 100

Subtopic:  Abiotic Factors: Light & Water (OLD NCERT) |
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Organisms that are tolerant for a wide range of salinity are called:

1. Stenohalines 2. Euryhalines
3. Halophytes 4. Stenothermals
Subtopic:  Abiotic Factors: Light & Water (OLD NCERT) |
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Small plants [herbs and shrubs], growing in forests, are usually adapted to photosynthesize optimally under:
1.Very high light conditions
2.Very low water conditions
3.Very high water conditions
4.Very low light conditions

Subtopic:  Abiotic Factors: Light & Water (OLD NCERT) |
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 Photoperiod affects:
1. Plants only
2. Animals only
3. Both plants and animals
4. Neither plants nor animals

Subtopic:  Abiotic Factors: Light & Water (OLD NCERT) |
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Which of the following algae is likely to be found in the deepest waters?
1.Green
2.Brown
3.Red
4.All are found at equal depths

Subtopic:  Abiotic Factors: Light & Water (OLD NCERT) |
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Thermoregulation and osmoregulation can be achieved by all:
1. Amniotes
2. Birds and mammals
3. Vertebrates
4. Chordates and insects

Subtopic:  Abiotic Factors: Temperature (OLD NCERT) | Abiotic Factors: Light & Water (OLD NCERT) | Response of Organisms to Abiotic Factors (OLD NCERT) |
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When exposed to cold temperatures, which of the following is responsible for maintaining constant body temperature in humans?
1. Vasoconstriction and shivering
2. Vasodilation and shivering
3. Vasodilation and sweating
4. Vasoconstriction and sweating

Subtopic:  Abiotic Factors: Temperature (OLD NCERT) | Response of Organisms to Abiotic Factors (OLD NCERT) |
 73%

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What percent of animals cannot maintain a constant internal environment?
1. 1 %
2. 25 %
3. 45 %
4. 99 %

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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Very small animals are rarely found in polar regions because:

1. Being smaller in size makes them highly vulnerable to predation.
2. They have a larger surface area relative to their volume.
3. Small size makes long distance migration difficult.
4. Small sized animals lack insulating body layers.

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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Keoladeo National Park, host to migratory birds from Siberia, is in:

1. Rajasthan 2. Uttar Pradesh
3. Madhya Pradesh 4. Gujarat

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