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Organisms and Populations · Question 83

AIPMT 2004MCQEasy📈 Topic in 12% papers+4−1
1

In which one of the following habitats does the diurnal temperature of soil surface vary most ?

  1. Grassland
  2. Desert
  3. Shrub land
  4. Forest

Answer

(2) Desert

Solution

Diurnal variation = difference between day and night temperature.

⇒ In a desert the soil is sandy and bare (no vegetation cover) and the air is dry with little cloud.

⇒ The soil surface heats up very quickly by day and loses heat rapidly at night by radiation.

∴ The diurnal temperature of the soil surface varies the most in deserts.

Answer: (2)

AIPMT 2004

Keep practising — Organisms and Populations

2

Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called:

  1. Biotic potential
  2. Environmental resistance
  3. Morbidity
  4. Fecundity
AIPMT 2003
3

Mycorrhiza is an example of :-

  1. Ectoparasitism
  2. Decomposers
  3. Endoparasitism
  4. Symbiotic relationship
AIPMT 2003
4

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
5

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
6

In a population, unrestricted reproductive capacity is called as -

  1. Biotic potential
  2. Birth rate
  3. Carrying capacity
  4. Fertility
AIPMT 2002
7

Cause of mimicry is -

  1. offence
  2. concealment
  3. defence
  4. both (2) and (3)
AIPMT 2002
8

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

  1. Cooperation
  2. Co-evolution
  3. Mutualism
  4. Commensalism
AIPMT 2002
9

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
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)