English

Define community.

Advertisements
Advertisements

Question

Define community.

Definition
Advertisements

Solution 1

A community is an assemblage of populations of different species living in the same area and interacting with one another.

shaalaa.com

Solution 2

A community is an association of a number of different interrelated populations belonging to different species in a common environment. A community is characterised by species diversity, coexistence and interdependence.

shaalaa.com
  Is there an error in this question or solution?
Chapter 13: Organisms and Populations - Exercises [Page 307]

APPEARS IN

Balbharati Biology [English] Standard 12 Maharashtra State Board
Chapter 13 Organisms and Populations
Exercises | Q 3 7. | Page 307
NCERT Biology [English] Class 12
Chapter 11 Organisms and Populations
EXERCISES | Q 6. b. | Page 204
Nootan Biology [English] Class 12 ISC
Chapter 13 Organisms and Populations
NCERT EXERCISES | Q 12. (ii) | Page 616

RELATED QUESTIONS

Apart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.


Why do clown fish and sea anemone pair up? What is this relationship called?


Name and explain the interaction that is seen between clownfish and sea anemones.


Name the type of association:

Clownfish and sea anemone


Name the type of association: Hummingbirds and host flowering plants


Define population.


Community is defined as ______.


The cattle egret and grazing cattle in close association is a classic example of ______.


Define Absolute Mortality.


How absolute Natality differs from Realized Natality


What is population ecology?


What is ESS?


What is commensalism? Explain it with a suitable example.


Define population growth. Explain different types of age pyramids.


Statement I: If one or two species are lost, it may not affect proper functioning of ecosystem.

Statement II: Loss of key species causes serious threat to functioning of ecosystem. Choose the correct alternative with reference to the above statements


Which of the following is TRUE for amensalism?


An interaction favourable to both population but no obligatory to either is ______.


A population has more young individuals compared to the older individuals. What would be the status of the population after some years?


Lichens are association of ______.


What is mycorrhiza?


Lianas are vascular plants rooted in the ground and maintain erectness of their stem by making use of other trees for support. They do not maintain direct relation with those trees. Discuss the type of association the lianas have with the trees.


Give one example for the following type.

Chemical defense agent


The value of 'Z' (regression coefficient) lies in the range of ______ regardless of the taxonomic group or the region.


Complete the following chart regarding population interaction and re-write:

Sr. No. Name of interaction Interaction between
1. ? Plasmodium and Man
2. ? Leopard and Lion
3. ? Clownfish and Sea-anemone

Interspecific interaction could be ______.


Many copepods live on the body surface of marine fish. This relationship is an example of ______.


Observe the graph given below.

The graph represents inter-specific interaction between two species of Paramecia competing for the same resource in a culture medium. Paramecium caudatum and Paramecium aurelia were grown in separate cultures as well as in mixed cultures. It was found that each species grew in numbers according to the logistic equation.

a) Which species is competitively superior? Support it with the data provided in the graph.

b) State the underlying principle for the above result and name the scientist associated with this principle.

c) Explain the mechanism in which two or more species competing with each other can co-exist.

OR

Graphs A and B shown below depict interaction of two species. Which graph indicates Mutualism? Give reason.

A B

Select the statement which best describes parasitism.


In which interaction of species, both the species are at a loss?


Mention the scientific name of protozoan parasite that causes Amoebiasis.


What happens to an inferior competitor if the superior competitor is removed from the environment?


Explain one type of mutualism.


Statement I: Gause’s competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.

Statement II: According to Gause’s principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.

In the light of the above statements, choose the correct answer from the options given below:


Statement I: Gause’s ‘Competitive Exclusion Principle states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. 

Statement II: In general, carnivores are more adversely affected by competition than herbivores.

In the light of the above statements, choose the correct answer from the options given below:


Which interaction type is characterized by both species being benefited?


In parasitism, which organism derives nourishment from the other?


In commensalism, how is the unaffected species impacted by the interaction?


Cattle egrets feeding on insects disturbed by grazing cattle is an example of which population interaction?


In neutralism, what is the relationship between the two species?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×