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Organisms and Populations · Question 33

NEET 2018MCQEasy📈 Topic in 12% papers+4−1
1

Niche is

  1. all the biological factors in the organism’s environment
  2. the physical space where an organism lives
  3. the range of temperature that the organism needs to live
  4. the functional role played by the organism where it lives

Answer

(4) the functional role played by the organism where it lives

Solution

As per NCERT, each organism has an invariably defined range of conditions that it can tolerate, diversity in the resources it utilises and a distinct functional role in the ecological system; all these together comprise its niche.

The physical space where an organism lives is its habitat, not its niche.

∴ Niche is the functional role played by the organism where it lives.

Answer: (4)

NEET 2018

Keep practising — Organisms and Populations

2

Which one of the following population interactions is widely used in medical science for the production of antibiotics?

  1. Commensalism
  2. Mutualism
  3. Parasitism
  4. Amensalism
NEET 2018
3

Natality refers to

  1. death rate
  2. birth rate
  3. number of individuals leaving the habitat
  4. number of individuals entering a habitat
NEET 2018
4

In a growing population of a country,

  1. pre-reproductive individuals are more than the reproductive individuals
  2. reproductive individuals are less than the post-reproductive individuals
  3. reproductive and pre-reproductive individuals are equal in number
  4. pre-reproductive individuals are less than the reproductive individuals.
NEET 2018
5

Asymptote in a logistic growth curve is obtained when :

  1. K > N
  2. The value of 'r' approaches zero
  3. K < N
  4. K = N
NEET 2017
6

Plants which produce characteristic pneumatophores and show vivipary belong to :

  1. Halophytes
  2. Psammophytes
  3. Hydrophytes
  4. Mesophytes
NEET 2017
7

Mycorrhizae are the example of :

  1. Fungistasis
  2. Antibiosis
  3. Mutualism
  4. Amensalism
NEET 2017
8

It is much easier for a small animal to run uphill than for a large animal, because -

  1. The efficiency of muscles in large animals is less than in the small animals
  2. Smaller animals have a higher metabolic rate
  3. It is easier to carry a small body weight
  4. Small animals have a lower O2 requirement
NEET 2016 (Phase 1)
9

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K)

  1. When death rate is greater than birth rate.
  2. When N/K equals zero.
  3. When N/K is exactly one.
  4. When N nears the carrying capacity of the habitat.
NEET 2016 (Phase 1)
10

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
NEET 2016 (Phase 1)
11

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
NEET 2016 (Phase 2)

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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
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