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Organisms And Populations

Question

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A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations. A and B twenty years apart. Select the correct interpretation about them

Interpretations

'A' is more recent and shows slight reduction in the growth rate

'B' is earlier pyramid and shows stabilised

'B' is more recent showing that population is very young

'A' is the earlier pyramid and no change has occurred in the growth rate

Solution

A.

'A' is more recent and shows slight reduction in the growth rate

Interpretation 'A' is correct for the given figures.

Some More Questions From Organisms and Populations Chapter

Population density is denoted by the symbol

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

The departure of a individual from a population is called :

In which interaction only one species is benefitted while the other species is neither harmed nor benefitted ?

Which of the following interaction both species suffer ?

In which of the following interaction both species are benefitted ?

Fill in the blanks with suitable words :

1. The optimal capacity of the organism to produce offspring is called........................

2. Rapid increase in human population is called........................

3. Mathematical expression of the growth of population is called........................

4. Yeast cells grown in a culture medium show........................growth curve.

5. Main cause of population explosion is........................

State true or false :

Coin one word for the following statements :
1.Organism that can tolerate only a narrow range of salinity.

2. Plants that can survive a wide range of temperature.

3. Interaction of two species in which one is benefited while other is neither benefited nor harmed.

4. Number of births during a given period in the population that are added to the initial density.

5. the process of maintaing a constant body temperature.

A few organisms can tolerate and thrive in a wide range of temperature, they are called........................

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