Homeostasis is 

1. tendency to change with change in environment

2. tendency to resist change

3 disturbance in regulatory control

4. plants and animals extracts used in homeopathy

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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The most ecologically relevant environmental factor is:

1. Temperature

2. Water

3. Light

4. Soil

Subtopic:  Abiotic Factors: Temperature (OLD NCERT) |
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Many freshwater animals cannot live for long in sea water and vice versa because of:

1. Buoyancy related problems

2. Lack of impermeable skins

3. Thermolabile enzymes

4. Osmotic considerations

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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While heat gain or heat loss is the function of ______, heat production is the function of ________ of the body of an animal.

1. Volume; Surface area

2. Surface area; Volume

3. Volume; Volume

4. Surface area; Surface area

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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Which one of the following are important biotic factors that can affect the structure and organization of biological communities?

1. Temperature and rainfall

2. Nutrient availability and soil pH

3. Predation and competition

4. Light intensity and seasonality

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

1. Smaller animals have a relatively slower heart rate

2. Smaller animals have a more surface area relative to their volume

3. Smaller animals are invariably herbivores

4. Smaller animals rely on diffusion for exchange of gases with the environment

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot

summer, thousands of migratory birds from Siberia and other extremely cold Northern

regions move to

1. Western Ghat               

2. Meghalaya

3. Corbett National Park     

4. Keoladeo National Park

Subtopic:  Response of Organisms to Abiotic Factors (OLD NCERT) |
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Consider the following four conditions (I-IV) and select the correct pair of them as adaptation to environment in desert lizards.
The conditions:
I.  Burrowing in soil to escape high temperature
II. Losing heat rapidly from the body during high temperature
III. Bask in sun when temperature is low
IV. Insulating body due to thick fatty dermis

1. (I) and (III)
2. (II) and (IV)
3. (I) and (II)
4. (III) and (IV)

Subtopic:  Adaptations (OLD NCERT) |
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Consider the following four statements (i-iv) about certain desert animals such as

kangaroo rat.

(i) they have dark colour and high rate of reproduction and excrete solid urine.

(ii) they do not drink water, breathe at a slow rate to conserve water and have their

body

covered with thick hairs.

(iii) they feed on dry seeds and do not require drinking water

(iv) they excrete very concentrated urine and do not use water to regulate body

temperature.

Which two of the above statements for such animals are true?

1. iii and iv

2. ii and iii

3. iii and i

4. i and ii

Subtopic:  Adaptations (OLD NCERT) |
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Bacteria, fungi, lower plants survive in adverse conditions by:

(1) diapause                           

(2) suspended growth

(3) migration                         

(4) formation of thick-walled spores

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