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Organisms And Populations

Question
CBSEENBI12046869
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In biotic community, which of the following can be called protective device ?

  • Mimicry

  • Symbiosis

  • Competition

  • Parasitism

Solution

A.

Mimicry

Mimicry is characterized by the superficial resemblance of two or more organisms that are not closely related taxonomically. Also, it is a resemblance of one organism to another which has evolved as a means of protection. Therefore, it is considered as a superficial protective device in a biotic community.

Symbiosis refers to a close, long term interaction between two different species. It is of several types. Mutualism, Commensalism, Parasitism are types of symbiotic relationships.

Competition is an interaction between organisms or species in which both the organisms or species are harmed.

Parasitism is a relationship between species, where one organism ie, the parasite, lives on or in another organisms ie, the host, causing it some harm and hence, is adapted structurally to this way of life.

Some More Questions From Organisms and Populations Chapter

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........................ 

The parasites that feed on external surface of host organisms are called ........................

The parasites that live inside the body at different sites (liver, kidney, lungs, RBC etc.) are called........................

List two negative interactions between two species.

What is the  term for cryptic-colouring in organisms to avoid being detected easily by the predator
?

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