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Organisms And Populations

Question
CBSEENBI12047055

Which one of the following is a matching pair of certain organism(s) and the kind of association?

  • Shark and sucker fish - commensalism

  • Algae and fungi in lichens - mutualism

  • Orchids growing on trees - parasitism

  • Cuscuta (dodder) growing in other flowering plants - epiphytism.

Solution

B.

Algae and fungi in lichens - mutualism

The association between fungi and algae in lichen is regarded as the true mutual relationship, in which both the partners are bcncfittcd. In lichen, fungus lives on the algae which manufactures food by virtue of the hlorophyll present in its cells, while the algae enjoys the protection afforded by the fungal envelope, to live in very dry conditions.

Some More Questions From Organisms and Populations Chapter

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 ........................ 

The organisms ideally try to maintain the constancy of its internal environment by the process called........................

Mammals from colder climates have shorter ears and limbs to minimize heat loss. This rule is called........................