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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
Explain mutualism with the help of any two examples.
Describe the mutual relationship between fig tree and wasp and comment on the phenomenon that operates in their relationship.
Name the type of association: Hummingbirds and host flowering plants
Distinguish between the following: Parasitism and Mutualism.
Define population.
In Logistic growth curve lag phase shows______.
Define Absolute Mortality.
What is population ecology?
What is ESS?
Explain different population interactions with examples.
Match the following and choose the correct combination from the options given below.
| Column I | Column II |
| Mutualism | Lion and deer |
| Commensalism | Round worm and man |
| Parasitism | Birds compete with squirrels for nuts |
| Competition | Sea anemone on hermit crab |
| Predation | Barnacles attached to Whales |
Define the following term:
Parasitism
______ is the adaptation of an organism i which it matches its colour with its surroundings to get protected from predators.
Type of interspecific interaction wherein one organism is benefited and other is harmed is called ____________.
______ interaction is the biological interaction between organisms of same population.
Match the Columns.
| Column A | Column B | ||
| i. | Lice on humans | a. | Endoparasites |
| ii. | Ectoparasites on marine fishes | b. | Grows on hedge plants |
| iii. | Cuscuta | c. | Ectoparasites |
| iv. | Plasmodium and humans | d. | Copepods |
Which one of the following is an example of predation?
Substantiate by giving two reasons as to why a holistic understanding of the flora and fauna the cropland is required before introducing an appropriate biocontrol method.
Exarch xylem is found in:
Which one of the following is one of the characteristics of a biological community?
An interaction favourable to both population but no obligatory to either is ______.
There are two optional ways of exploitation one way is parasitism. Which is the other one ______.
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 the interaction between two species called?
Fill in the blanks
| Species A | Species B | Type of Interaction | Example |
| + | - | ______ | ______ |
| + | + | ______ | ______ |
| + | 0 | Commensalism | ______ |
Observe the set of 4 figures A, B, C and D and, answer the following questions
- Which one of the figures shows mutualism?
- What kind of association is shown in D?
- Name the organisms and the association in C.
- What role is the insect performing in B?
 Fig. (A) |
 Fig. (B) |
 Fig. (C) |
 Fig. (D) |
Between which among the following, the relationship is not an example of
?
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 |
A Tight one-to-one relationship between many species of fig tree and certain wasps is an example of ______.
Some orchids live on the branches of mango trees. Name the type of interaction that exists between the mango tree and the orchid.
What happens to an inferior competitor if the superior competitor is removed from the environment?
Give one example of parasitism.
Give one example of camouflage.
Explain one type of mutualism.
Given below are two statements.
Statement I - The amount of energy available in an ecosystem increases at each successive trophic level.
Statement II - Transfer of energy from one trophic level to the other follows 10% law.
In light of the above statements, select the correct option given below.
