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Q. No.An association of individuals of different species living in the same habitat and having functional interactions is known as:
| 1. | Ecological niche | 2. | Biotic community |
| 3. | Ecosystem | 4. | Population |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn which of the following interactions both partners are adversely affected?
| 1. | Competition | 2. | Predation |
| 3. | Parasitism | 4. | Mutualism |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that:
| 1. | both plant populations in this habitat decreased |
| 2. | population-B competed more successfully for food than population-A |
| 3. | population-A produced more offspring than population-B |
| 4. | population-A consumed the members of population-B |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA sedentary sea anemone gets attached to the shell lining of a hermit crab. The association is:
1. Symbiosis
2. Commensalism
3. Amensalism
4. Ectoparasitism
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:
1. 15
2. 05
3. zero
4. 10
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAccording to Darwin, organic evolution is due to:
| 1. | Interspecific competition. |
| 2. | Competition within closely related species. |
| 3. | Reduced feeding efficiency in one species due to the presence of interfering species. |
| 4. | Intraspecific competition. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. high percentage of old individuals
2. low percentage of young individuals
3. a stable population
4. high percentage of young individuals
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. Development of adhesive organs
2. Loss of digestive organs
3. Loss of reproductive capacity
4. Loss of unnecessary sense organs
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPeople who have migrated from the planes to an area adjoining Rohtang Pass about six months back:
| 1. | Have more RBCs and their haemoglobin has a lower binding affinity to 02 |
| 2. | Are not physically fit to play games like football |
| 3. | Suffer from altitude sickness with symptoms like nausea, fatigue, etc. |
| 4. | have the usual RBC count but their haemoglobin has a very binding affinity to 02 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCuscuta is an example of:
1. Brood parasitism
2. Predation
3. Endoparasitism
4. Ectoparasitism
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