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प्रश्न
What is mycorrhiza?
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उत्तर
Mycorhiza is a symbiotic association between a fungus and the roots of higher plants.
संबंधित प्रश्न
Apart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
Name important defence mechanisms in plants against herbivory.
Select the statement which explains best parasitism.
- One organism is benefited
- Both the organisms arc benefited
- One organ is benefitted, other is affected.
- One organism is benefited, other is affected
Name and explain the interaction that is seen between clownfish and sea anemones.
Name the type of association: Crow feeding the hatchling of Koel
Define the following term:
Camouflage
Distinguish between the following: Parasitism and Mutualism.
Define Community.
The cattle egret and grazing cattle in close association is a classic example of ______.
Explain any three important characteristics of population.
What is Commensalism? Explain it with a suitable example.
Define the following term:
Parasitism
Identify the interspecific interaction depicted in the following figure.
Cattle egrets always foraging close to the grazing cattle is an example of ____________.
Which of the following is NOT an example of mutualism?
Musk deer is an example of ______
The presence or interference of one species leads to reduction in feeding efficiency of other species is termed as
Define stenohaline species.
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 | ______ |
In an association of two animal species, one is a termite which feeds on wood and the other is a protozoan Trichonympha present in the gut of the termite. What type of association they establish?
Give one example for the following type.
Camouflaged animal
Give one example for the following type.
Biological control agent
A Tight one-to-one relationship between many species of fig tree and certain wasps is an example of ______.
"Cattle and goats do not browse the Calotropis plant." Justify the statement giving reasons.
"Abingdon tortoise in Galapagos islands became extinct within a decade on introduction of goats in the island." Explain giving reason.
What happens to an inferior competitor if a superior competitor is present in the same environment?
