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Organisms and Populations · Question 76

AIPMT 2006MCQEasy📈 Topic in 100% papers+4−1
1

Niche overlap indicates-

  1. Sharing of one or more resources between the two species
  2. Mutualism between two species
  3. Active cooperation between two species
  4. Two different parasites on the same host

Answer

(1) Sharing of one or more resources between the two species

Solution

A niche is the functional role of a species, including the range of resources it uses.

⇒ When the niches of two species overlap, both use one or more common resources (food, space, nesting sites).

⇒ As per NCERT, such shared, limited resources lead to interspecific competition — not mutualism or cooperation.

∴ Niche overlap indicates sharing of one or more resources between the two species.

Answer: (1)

AIPMT 2006

Keep practising — Organisms and Populations

2

More than 70% of world's fresh water is contained in –

  1. Polar ice
  2. Greenland
  3. Antarctica
  4. Glaciers and Mountains
AIPMT 2005
3

At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation -

  1. 40 North and South
  2. 42 12 North and South
  3. 66 North and South
  4. 22 12 North and South
AIPMT 2005
4

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example

  1. Poison fangs in snakes
  2. Enlargement of body size by swallowing air in puffer fish
  3. Colour change in chameleon
  4. Melanism in moths
AIPMT 2005
5

Which one of the following pairs is mismatched ?

  1. Tundra - permafrost
  2. Savanna - acacia trees
  3. Prairie - epiphytes
  4. Coniferous forest - evergreen trees
AIPMT 2005
6

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
AIPMT 2004
7

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
AIPMT 2004
8

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
AIPMT 2004
9

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
10

Mycorrhiza is an example of :-

  1. Ectoparasitism
  2. Decomposers
  3. Endoparasitism
  4. Symbiotic relationship
AIPMT 2003
11

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

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