When the feeding efficiency of one species is reduced due to the inhibitory presence of the other species, even if resources are abundant, it is called:
1. | Interference competition | 2. | Exploitative competition |
3. | Amensalism | 4. | Predation |
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In general, competition has the least impact on:
1. | Plants | 2. | Herbivores |
3. | Carnivores | 4. | Both 1 and 2 |
Which of the following is not usually an adaptation for a parasitic mode of life?
1. | Loss of unnecessary sense organs |
2. | Presence of adhesive organs or suckers |
3. | Loss of the digestive system |
4. | Low reproductive capacity |
Flowers and their insect pollinators must undergo co-evolution because:
1. | Without pollinators plants may get extinct |
2. | Plants have to reward the pollinators |
3. | The relationship must be safeguarded against cheaters |
4. | Insects are the major pollinators of plants |
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Identify the biome that is not correctly matched with its mean annual temperature and mean annual precipitation:
|
Biome |
Mean annual temperature [0C] |
Mean annual precipitation [cm] |
1. |
Desert |
0 – 25 |
25 – 100 |
2. |
Temperate Forest |
10 – 22 |
50 – 220 |
3. |
Tropical forest |
20 – 25 |
150 – 425 |
4. |
Coniferous forest |
0 – 15 |
50 – 250 |
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The relationship between cattle egret and grazing cattle can be best described as:
1. | Mutualism | 2. | Commensalism |
3. | Parasitism | 4. | Competition |
Match plants in Column I with their Ecological adaptations in Column II and select the correct answer from the codes given:
|
Plants |
|
Ecological adaptation |
A. |
Mangroves |
P. |
High-temperature optima for photosynthesis |
B. |
Heliophytes |
Q. |
Deep root systems |
C. |
Water hyacinth |
R. |
Viviparity |
D. |
Prosopis |
S. |
Inflated petiole |
Codes:
A | B | C | D | |
1. | R | P | S | Q |
2. | S | P | R | Q |
3. | R | P | Q | S |
4. | P | Q | R | S |
Autecology is the:
1. | Relation of heterogeneous populations to their environment |
2. | Relation of an individual to its environment |
3. | Relation of a community to its environment |
4. | Relation of a biome to its environment |
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Biosphere is:
1. | A component in the ecosystem |
2. | Composed of the plants present in the soil |
3. | Life in the outer space |
4. | Composed of all living organisms present on earth which interact with the physical environment |
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Salt concentration (Salinity) of the sea measured in parts per thousand is:
1. 10-15
2. 30-70
3. 0-5
4. 30-35
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