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Q. No.Ecology describes
| 1. | Interactions between living organisms only |
| 2. | Interactions between members of a single species only |
| 3. | Interactions of organisms among themselves as well as with their surrounding abiotic components |
| 4. | Intraspecific competitions only |
Subtopic: Introduction to Ecology |
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Subtopic: Introduction to Ecology |
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Ecological niche is:(NCERT Exemplar)
| 1. | The surface area of the ocean |
| 2. | An ecologically adapted zone |
| 3. | The physical position and functional role of a species within the community |
| 4. | Formed of all plants and animals living at the bottom of a lake |
Subtopic: Introduction to Ecology |
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Ecology is basically concerned with four levels of biological organisation. Which one of the following is the correct representation?
| 1. | PopulationEcosystemBiomeLandscape |
| 2. | CommunitiesPopulationEcosystemBiome |
| 3. | OrganismsPopulationCommunitiesBiome |
| 4. | SpeciesEcosystemCommunitiesBiome |
Subtopic: Introduction to Ecology |
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Which is the correct order of ecological hierarchy?
(1) Biome Populations Community Organism
(2) Organism Biome Population Community
(3) Population Community Biome Organism
(4) Organism Population Community Biome
Subtopic: Introduction to Ecology |
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Members of a population
| 1. | Can interbreed and produce fertile offsprings |
| 2. | Share a common gene pool |
| 3. | Share or competitor for similar resources |
| 4. | More than one option is correct |
Subtopic: Introduction to Ecology |
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Niche is
| 1. | All the biological factors in the organism environment |
| 2. | The physical space where an organism live |
| 3. | The range of temperature that the organism needs to live |
| 4. | The functional role played by the organism where it lives |
Subtopic: Introduction to Ecology | Organisms and its Environment (OLD NCERT) |
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Why is total number sometimes an inappropriate measure of population density?
| 1. | Total number always provides an accurate measure of population density, regardless of species differences in size and ecological roles. |
| 2. | In cases where individuals vary greatly in size or impact, measuring population density based on percent cover or biomass is more meaningful than simple numerical count. |
| 3. | Population density can only be determined using total number, and alternate measures like biomass or percent cover do not provide ecological insights. |
| 4. | Total number is an effective measure only in large populations; for small populations, alternative measures are irrelevant. |
Subtopic: Population Characters: Density |
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The average per capita birth rate, or __________, increases population size, whereas the average per capita death rate, or ___________, decreases population size.
| 1. | natality; demography |
| 2. | exploitation competition; interference competition |
| 3. | mortality; natality |
| 4. | natality; mortality |
Subtopic: Population Characters: Natality & Mortality |
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Mutually beneficial associations between certain soil fungi and the roots of most plant species are called
1. mycorrhizae
2. pneumatophores
3. nodules
4. rhizobia
1. mycorrhizae
2. pneumatophores
3. nodules
4. rhizobia
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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