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Question

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Explain J-Shaped pattern of population growth.

Solution

J-shaped Growth curve shows the exponential or geometric growth pattern of a population. The graph is obtained when Population density or the number of organisms in a population is plotted against time.

Fig. J-Shaped growth curve.

It has two phases:
1. Lag phase. It is period of adaptation of animals to new environment so is characterized by slow or no growth in population.
2. Logarithmic or Exponential phase. It is characterized by rapid growth in population in a short time , under unlimited resource conditions .

Some More Questions From Organisms and Populations Chapter

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........................

Majority of organisms are restricted to a narrow range of temperature, such organisms are called ........................

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