MEDIUM
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Write about commensalism.
Important Questions on Organisms and Populations
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Assertion (A): The Monarch butterfly feeds on poisonous weeds during its caterpillar stage.
Reason (R): It helps butterfly to become distasteful to the predator.
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1) The human liver fluke, a nematode parasite, depends on two intermediate hosts (a snail and a fish) to complete its life cycle.
2) The malarial parasite needs a vector (mosquito) to spread to other host organisms.
3) In case of brood parasitism, the eggs of parasitic birds (e.g., cuckoo) are not detected and removed from the nest because the parasite's eggs resemble the host's eggs in morphology and colour.
4) A population of frogs protected from all predators would decrease indefinitely.
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Given the graphs below, the interaction between species and can be classified as
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Match column-I with column-II and select the correct option.
| Column-I | Column-II | ||
| a) | Commensalism | i) | Lichen |
| b) | Mutualism | ii) | Plasmodium |
| c) | Parasitism | iii) | Hawk |
| d) | Predation | iv) | Orchid |
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Match the following?
| The list I | List II | ||
| (i) | Calotropis | (a) | Predator of Americana Pacific |
| (ii) | Cactus | (b) | Insects and frogs cryptically coloured |
| (iii) | Pisaster | (c) | Distasteful glycosides |
| (iv) | Monarch Butterfly | (d) | Cardiac glycosides |
| (v) | Camouflage | (e) | Predator is a moth |
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| Column-I | Column-II | ||
|---|---|---|---|
| Saprophyte | Symbiotic association of fungi with plant roots | ||
| Parasite | Decomposition of dead organic materials | ||
| Lichens | Living on living plants | ||
| Mycorrhiza | Symbiotic association of algae and fungi |
Choose the correct answer from the options given below:
