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प्रश्न
Describe mutualism.
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उत्तर
- This interaction is obligatory and interdependent.
- It benefits both the species.
- Lichens represent an intimate, mutualistic relationship between a fungus and photosynthetic algae, or cyanobacteria.
- The most spectacular and evolutionarily fascinating examples of mutualism are found in plant-animal relationships.
- Plants need the help of animals for pollinating their flowers and dispersing their seeds.
- Animals obviously have to be rewarded in the form of pollen and nectar for pollinators and juicy and nutritious fruits for seed dispersers.
- Co-evolution of mutualists.
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संबंधित प्रश्न
Name the type of association: Hummingbirds and host flowering plants
Identify the interspecific interaction in which species A is harmed and species B is unaffected.
Identify the morphological means of defence to avoid herbivores shown by plants.
With the decline in the population of fig species it was noticed that the population of wasp species also started to decline. What is the relationship between the two and what could be the possible reason for decline of wasps?
Match the Column I with Column II.
| Column I | Column II |
| A. Lichen | (i) Commensalism |
| B. Shark and Pilot fish | (ii) Mutualism |
| C. Barnacles on the back of a whale | (iii) Symbiotic obligatory relationship |
| D. Sharks and dolphins | (iv) Competition |
Between which among the following, the relationship is not an example of
?
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 commensalism.
In the sign convention for population interactions, what does the symbol '+' represent?
In parasitism, which organism derives nourishment from the other?
