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Organisms And Populations

Question
CBSEENBI12001730
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Explain mutualism with the help of any two examples. How is it different from commensalism?

Solution

Mutualism is the interaction which confers benefits on both the interacting species.

For example:

i. Lichens represent an intimate mutualistic relationship between a fungus and photosynthesizing algae or cyanobacteria in which the fungus provides protection to the algae or cyanobacteria and the algae and cyanobacteria provide food to the fungus.

ii. Mycorrhizae are associations between fungi and roots of higher plants. Fungi help the plant in the absorption of essential nutrients from the soil while the plant, in turn provides the fungi with energy-yielding carbohydrates.

In commensalism the interaction where one species is benefitted and the other is neither benefitted nor harmed is called commensalism.

 Species            Species                 Name of interaction

A                             B

+                             +                            Mutualism

+                             0                            Commensalism

Some More Questions From Organisms and Populations Chapter

To live in groups is beneficial because :

Ants give information to their companions :

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 :

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