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Organisms and Populations

NEET 2016 (Phase 1)MCQEasy📈 Topic in 100% papers+4−1
Ques. 1NEET 2016 (Phase 1)

Gause's principle of competitive exclusion states that -

  1. Larger organisms exclude smaller ones through competition
  2. More abundant species will exclude the less abundant species through competition
  3. Competition for the same resources excludes species having different food preferences
  4. No two species can occupy the same niche indefinitely for the same limiting resources

Answer

(4) No two species can occupy the same niche indefinitely for the same limiting resources

Solution

As per NCERT, Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely, and the competitively inferior one will be eliminated eventually.

∴ No two species can occupy the same niche indefinitely for the same limiting resources.

Answer: (4)

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Ques. 2NEET 2016 (Phase 2)

Which of the following is correct for r-selected species ?

  1. Small number of progeny with small size
  2. Small number of progeny with large size
  3. Large number of progeny with small size
  4. Large number of progeny with large size
Ques. 3NEET 2016 (Phase 2)

If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to

  1. parasitism
  2. commensalism
  3. mutualism
  4. amensalism
Ques. 4NEET 2016 (Phase 2)

The principle of competitive exclusion was stated by

  1. MacArthur
  2. G. F. Gause
  3. Verhulst & Pearl
  4. C. Darwin
Ques. 5AIPMT 2015

In which of the following interactions both partners are adversely affected?

  1. Competition
  2. Predation
  3. Mutualism
  4. Parasitism
Ques. 6AIPMT 2015 (Cancelled)

The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that: [figure]

  1. Population B competed more successfully for food than population A
  2. Population A consumed the members of population B
  3. Both plant populations in this habitat decreased
  4. Population A produced more offspring than population B
Ques. 7AIPMT 2015 (Cancelled)

Most animals are tree dwellers in a:

  1. temperate deciduous forest
  2. tropical rain forest
  3. coniferous forest
  4. thorn woodland
Ques. 8AIPMT 2014

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. Keoladeo National Park
  2. Meghalaya
  3. Corbett National Park
  4. Western Ghat
Ques. 9NEET 2013

A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :

  1. Commensalism
  2. Amensalism
  3. Ectoparasitism
  4. Symbiosis
Ques. 10NEET 2013

A 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. 10
  4. zero
Ques. 11NEET 2013 (Karnataka)

The age pyramid with broad base indicates :

  1. high percentage of young individuals
  2. high percentage of old individuals
  3. a stable population
  4. low percentage of young individuals

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All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)