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Organisms and Populations

AIPMT 2005MCQEasy📈 Topic in 12% papers+4−1
Ques. 1AIPMT 2005

Which one of the following pairs is mismatched ?

  1. Tundra - permafrost
  2. Savanna - acacia trees
  3. Prairie - epiphytes
  4. Coniferous forest - evergreen trees

Answer

(3) Prairie - epiphytes

Solution

Tundra has a permanently frozen subsoil (permafrost); savanna is a tropical grassland with scattered acacia trees; coniferous forests have evergreen trees such as pine and spruce.

Prairie, however, is a temperate grassland dominated by grasses, with no tall trees to support epiphytes, which are characteristic of the tropical rain forest.

∴ The mismatched pair is Prairie - epiphytes.

Answer: (3)

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Ques. 2AIPMT 2004

Certain characteristic demographic features of developing countries are -

  1. High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
  2. High mortality, high density, uneven population growth and a very old age distribution
  3. High fertility, high density, rapidly rising mortality rate and very young age distribution
  4. High infant mortality, low fertility, uneven population growth and a very young age distribution
Ques. 3AIPMT 2004

In which of the following pairs is the specific characteristic of a soil not correctly matched ?

  1. Chernozems – Richest soil in the world
  2. Laterite – Contains aluminium compound
  3. Terra rossa – Most suitable for roses
  4. Black soil – Rich in calcium carbonate
Ques. 4AIPMT 2004

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
Ques. 5AIPMT 2003

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
Ques. 6AIPMT 2003

Mycorrhiza is an example of :-

  1. Ectoparasitism
  2. Decomposers
  3. Endoparasitism
  4. Symbiotic relationship
Ques. 7AIPMT 2002

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
Ques. 8AIPMT 2002

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
Ques. 9AIPMT 2002

In a population, unrestricted reproductive capacity is called as -

  1. Biotic potential
  2. Birth rate
  3. Carrying capacity
  4. Fertility
Ques. 10AIPMT 2002

Cause of mimicry is -

  1. offence
  2. concealment
  3. defence
  4. both (2) and (3)
Ques. 11AIPMT 2002

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

  1. Cooperation
  2. Co-evolution
  3. Mutualism
  4. Commensalism

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