## Chapter Chosen

Organisms and Populations

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

The table below gives the populations (in thousand) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within  brackets aginst each. study the table and answer the question which follows:

 Area and number of habitats Species and their populations (in thousands) in the area A B C D E F G H I J a(11) b(11) c(13) d(12) 23 1.2 0.52 6.0 - 3.1 1.1 9.0 - 10.3 10.2 - 0.62 - 1.5 3.0 - 8.2 1.1 11.2 11.3 0.9 0.48 2.4 1.4 4.2 0.8 8.4 2.2 4.1 3.2 10.2 11.1 4.8 0.4 3.3 0.8 7.3 11.3 2.1

Which area out of a to d shows maximum species diversity?

• b

• c

• d

• a

C.

d

Habitat is the place where an organism live. The population has been defined as a collective group of organisms of the same species occupying a particular place at a particular time. In the given table area d has maximum species diversity, as there are 10 species (A-J) reside in 12 habitats, while in area c the 10 species reside in 13 habitats so, exhibit less diversity than area d.

Habitat is the place where an organism live. The population has been defined as a collective group of organisms of the same species occupying a particular place at a particular time. In the given table area d has maximum species diversity, as there are 10 species (A-J) reside in 12 habitats, while in area c the 10 species reside in 13 habitats so, exhibit less diversity than area d.

332 Views

To live in groups is beneficial because :
• feeling of security
• can obtain food easily
• Partner is available for mating
• All the above

D.

All the above
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Ants give information to their companions :
• by dancing
• by secretion of pheromones
• by making sound
• by defecating

B.

by secretion of pheromones
697 Views

The departure of a individual from a population is called :
• Natality
• Mortality
• Immigration
• Emigration

D.

Emigration
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The number of births during a given period in the
population that are added to the initial density is

:
• Natality
• Mortality
• Migration
• Immigration

A.

Natality
587 Views

Population density is denoted by the symbol
• N
• D
• M
• D

A.

N
738 Views