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Q. No.Read the following statements and state true (T) or false (F) for them.
A:
The level of thermal tolerance of different species determine to a large extent their geographical distribution.
B:
A vast majority of organisms are stenothermal.
A
B
1.
T
F
2.
F
T
3.
T
T
4.
F
F
Subtopic: Abiotic Factors: Temperature (OLD NCERT) |
70%
From NCERT
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State true (T) or false (F) for the following statements and select the correct option
| A: | Soil composition, grain size and aggregation determine the percolation and water holding capacity of the soil. |
| B: | Not all the colour components of the visible spectrum are available for marine plants living at different depths of the ocean. |
| A | B | |
| 1. | T | F |
| 2. | F | T |
| 3. | T | T |
| 4. | F | F |
Subtopic: Abiotic Factors: soil |
88%
From NCERT
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The clownfish gets protection from predators with the help of sea anemone but sea anemone does not appear to derive any benefit by hosting the clownfish. This type of interaction is
1. Proto-cooperation
2. Mutualism
3. Parasitism
4. Commensalism
1. Proto-cooperation
2. Mutualism
3. Parasitism
4. Commensalism
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
89%
From NCERT
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Read the following statements and select the correct option.
1. Only statement A is correct
2. Only statement B is correct
3. Both statements A and B are correct
4 Both statements A and Bare incorrect
| A: | Allen's rule states that mammals from colder climates generally have shorter ears and limbs to minimize heat loss. |
| B: | Antarctic fishes can survive below 0°C. |
1. Only statement A is correct
2. Only statement B is correct
3. Both statements A and B are correct
4 Both statements A and Bare incorrect
Subtopic: Adaptations (OLD NCERT) |
88%
From NCERT
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Population size of a given area or space can be determined by many ways. One of the methods called total number count is not useful for
1. Siberian cranes at Bharatpur wetlands
2. Humans living in city Delhi
3. Dense culture of bacteria in a petri dish
4. Total number of trees in a particular small area
1. Siberian cranes at Bharatpur wetlands
2. Humans living in city Delhi
3. Dense culture of bacteria in a petri dish
4. Total number of trees in a particular small area
Subtopic: Population Attributes |
75%
From NCERT
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The prickly pear cactus when introduced into Australia in the early 1920's caused havoc by . spreading rapidly into millions of hectares of rangeland because
1. The soil of invaded land was fertile for cactus.
2. It was cultivated for its economic importance
3. The invaded land did not have its natural predators
4 It was not eaten by humans but by animals only
1. The soil of invaded land was fertile for cactus.
2. It was cultivated for its economic importance
3. The invaded land did not have its natural predators
4 It was not eaten by humans but by animals only
Subtopic: Population Interactions: Predation |
91%
From NCERT
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Which of the following algae are found most abundantly at shallowest and greatest depth of sea water respectively?
1. Red algae and green algae
2. Red algae and flrown algae
3. Green algae and red algae
4. Brown algae and red algae
1. Red algae and green algae
2. Red algae and flrown algae
3. Green algae and red algae
4. Brown algae and red algae
Subtopic: Abiotic Factors: Light & Water (OLD NCERT) |
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In a population interaction, any of the species is not benefited in any way. This interaction may be
1. Mutualism
2. Commensalism
3. Amensalism
4. Parasitism
1. Mutualism
2. Commensalism
3. Amensalism
4. Parasitism
Subtopic: Population Interactions: Amensalism |
81%
From NCERT
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When the competing superior species is experimentally removed then the other species expands its distributional range. This is proved by
| 1. | Removal of fish from sea led to dominate sea anemone |
| 2. | Removal of cattle egrets led barnacles to grow enormously |
| 3. | Removal of warblers from trees led to increase in frugivorous birds. |
| 4. | Removal of Balanus led Chathamalus to expand |
Subtopic: Population Interactions: Predation |
74%
From NCERT
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A variety of chemical substances that we extract from plants on a commercial scale such as nicotine, caffeine, opium etc. are produced by them actually
1. To increase the economic value
2. To make themselves poisonous
3. As defense against grazers and browsers
4. As metabolic regulators
1. To increase the economic value
2. To make themselves poisonous
3. As defense against grazers and browsers
4. As metabolic regulators
Subtopic: Population Interactions: Predation |
87%
From NCERT
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