Advertisements
Advertisements
प्रश्न
What is commensalism? Explain it with a suitable example.
Explain commensalism with the help of an example.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Which day is observed as ‘World Environment Day’?
Describe the mutual relationship between fig tree and wasp and comment on the phenomenon that operates in their relationship.
What is the ecological principle behind the biological control method of managing with pest insects?
How is mutualism different from commensalism?
Define the Stenothermal organisms.
Name the type of association: Hummingbirds and host flowering plants
Give one example of mutualism.
Define community.
The number of deaths under ideal conditions is known as ______.
What is ESS?
Explain different population interactions with examples.
The relationship between sucker fish and shark is _________.
Identify the interspecific interaction in which species A is harmed and species B is unaffected.
The interspecific interaction between Cuckoo and Crow is ______
Which of the following is NOT an example of mutualism?
Which one of the following is NOT an example of commensalism?
Exarch xylem is found in:
Which one of the following is one of the characteristics of a biological community?
Amensalism can be represented as ______
A population has more young individuals compared to the older individuals. What would be the status of the population after some years?
Amensalism is an association between two species where ______.
What is homeostasis?
What are the organisms that feed on plant sap and other plant parts called?
Give one example for the following type.
Biological control agent
Write the observations made at the end of Connell's field, experiment on barnacles on the rocky sea coasts of Scotland.
A bird laying its egg in the nest of another bird is the type of ______.
Interaction between clown fish living among the stinging tentacles of sea anemone is an example of ______.
"Some species of insects and frogs have evolved with various specific features that help them from being detected."
- Justify the statement giving reasons.
- Mention any two such features.
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 |
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.
Give one example of parasitism.
Give one example of camouflage.
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:
Parasitism is an interaction between two organisms in which ______.
Which interaction type is characterized by both species being benefited?
What is the sign convention for neutralism?
Which population interaction type involves both species being negatively affected?



