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Organisms and Populations · Question 85

AIPMT 2003MCQEasy📈 Topic in 100% papers+4−1
1

Mycorrhiza is an example of :-

  1. Ectoparasitism
  2. Decomposers
  3. Endoparasitism
  4. Symbiotic relationship

Answer

(4) Symbiotic relationship

Solution

As per NCERT, mycorrhizae are associations between fungi and the roots of higher plants.

⇒ The fungi absorb essential nutrients (e.g. phosphorus) from the soil and pass them to the plant, while the plant provides the fungi with energy-yielding carbohydrates.

∵ Both partners benefit, it is a mutualistic (symbiotic) relationship.

Answer: (4)

AIPMT 2003

Keep practising — Organisms and Populations

2

The growth curve of bacterial population in lab is plotted against time. What will be the shape of graph?

  1. Sigmoid
  2. Hyperbolic
  3. Ascending straight line
  4. Descending straight line
AIPMT 2002
3

Choose the correct sequence of stages of growth curve for bacteria.

  1. Lag, log, stationary, decline phase
  2. Lag, log, decline, stationary phase
  3. Stationary, lag, log, decline phase
  4. Decline, lag, log phase, stationary
AIPMT 2002
4

In a population, unrestricted reproductive capacity is called as -

  1. Biotic potential
  2. Birth rate
  3. Carrying capacity
  4. Fertility
AIPMT 2002
5

Cause of mimicry is -

  1. offence
  2. concealment
  3. defence
  4. both (2) and (3)
AIPMT 2002
6

Which type of association is found in between entomophilous flower and pollinating agent ?

  1. Cooperation
  2. Co-evolution
  3. Mutualism
  4. Commensalism
AIPMT 2002
7

Two different species can not live for long duration in the same niche or habitat. This law is : -

  1. Dollo's rule
  2. Weismann's theory
  3. Allen's law
  4. Gause's hypothesis
AIPMT 2002

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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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