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प्रश्न
What is Commensalism? Explain it with a suitable example.
Explain commensalism, with the help of an example.
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उत्तर
- Commensalism is the interaction between two species in which one species derives benefit and the other one is neither harmed nor benefited.
- This is the interaction in which one species benefits and the other is neither harmed nor benefited.
- An orchid growing as an epiphyte on a branch of a mango tree will benefit, while the mango tree derives no benefit.
- The cattle egret and grazing cattle in close association are a classic example of commensalism. Cattle egrets always forage close to cattle; as cattle move, they flush out insects that might be difficult for the egrets to find and catch.
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संबंधित प्रश्न
During .............. typs of interaction, both organisms are benefited
- mutualism
- competition
- commensalism
- parasitism
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?
What is the ecological principle behind the biological control method of managing with pest insects?
Name the two intermediate hosts which the human liver fluke depends on to complete its life cycle, so as to facilitate parasitization of its primary host.
Competition and Mutualism.
Select the statement which explains the best parasitism.
Give one example of Mutualism.
With the help of a suitable diagram, describe the logistic population growth curve.
Define Community.
Community is defined as ______.
Define mutualism.
Explain different population interactions with examples.
The interaction in nature, where one gets to benefit on the expense of other is _________.
Predation and parasitism are which type of interactions?
Competition between species leads to ________.
Identify the morphological means of defence to avoid herbivores shown by plants.
Identify the interspecific interaction depicted in the following figure.

Select the CORRECT match:
| I | II | ||
| i. | Competition | a. | Lichen |
| ii. | Commensalism | b. | Sea anemone and clownfish |
| iii. | Mutualism | c. | Lions and Leopards |
Parasitism can be conectly represented as ____________.
Which one of the following pair does NOT show commensalism?
______ in birds is an interesting example of parasitism in which the parasitic bird lays its eggs in the nest of its host and the host incubates them.
Which one of the following is one of the characteristics of a biological community?
The presence or interference of one species leads to reduction in feeding efficiency of other species is termed as
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
What is commensalism?
What are the organisms that feed on plant sap and other plant parts called?
In a pond, we see plants which are free-floating; rooted–submerged; rooted emergent; rooted with floating leaves; Write the type of plant against the following examples.
| Plant Name | Type | |
| a. | Hydrilla | ______ |
| b. | Typha | ______ |
| c. | Nymphaea | ______ |
| d. | Lemna | ______ |
| e. | Vallisneria | ______ |
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.
Sea Anemone gets attached to the surface of the hermit crab. The kind of population interaction exhibited in this case is ______.
Interspecific interaction could be ______.
"Cattle and goats do not browse the Calotropis plant." Justify the statement giving reasons.
Many copepods live on the body surface of marine fish. This relationship is an example of ______.
What are the special adaptations that endoparasites show?
The diagram given below shows the life cycle of a malarial parasite. Study it carefully and answer the questions that follows:

- Name the hosts in which the asexual phase and sexual phase of the life cycle takes place.
- Identify the infective stage labelled ‘D’.
- Name the structure labelled ‘A’ and ‘E’.
- Give any one symptom of malaria.
Describe mutualism.
