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Organisms and Populations · Question 43

NEET 2016 (Phase 2)MCQEasy📈 Topic in 0% papers+4−1
1

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

Answer

(3) Large number of progeny with small size

Solution

r-selected species are favoured in unstable, unpredictable environments; their strategy is to maximise the intrinsic rate of natural increase (r).

⇒ They breed early and produce a large number of small-sized offspring with little or no parental care (e.g. most insects, oysters, many fishes).

∵ K-selected species produce a small number of large-sized offspring with more parental care.

Answer: (3)

NEET 2016 (Phase 2)

Keep practising — Organisms and Populations

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
NEET 2016 (Phase 2)
3

The principle of competitive exclusion was stated by

  1. MacArthur
  2. G. F. Gause
  3. Verhulst & Pearl
  4. C. Darwin
NEET 2016 (Phase 2)
4

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

  1. Competition
  2. Predation
  3. Mutualism
  4. Parasitism
AIPMT 2015
5

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
AIPMT 2015 (Cancelled)
6

Most animals are tree dwellers in a:

  1. temperate deciduous forest
  2. tropical rain forest
  3. coniferous forest
  4. thorn woodland
AIPMT 2015 (Cancelled)
7

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
AIPMT 2014
8

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

  1. Commensalism
  2. Amensalism
  3. Ectoparasitism
  4. Symbiosis
NEET 2013
9

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
NEET 2013
10

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
NEET 2013 (Karnataka)
11

Which one of the following is not a parasitic adaptation ?

  1. Loss of digestive organs
  2. Loss of unnecessary sense organs
  3. Development of adhesive organs
  4. Loss of reproductive capacity
NEET 2013 (Karnataka)

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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
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