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प्रश्न
"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.
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उत्तर
(a) Prey species have evolved various defences to lessen the impact of predation. Some species of insects and frogs are cryptically coloured (camouflaged) to avoid being detected easily by the predator. Some are poisonous and therefore avoided by predators.
(b) (i) The Monarch butterfly is highly distasteful to its predator (bird) because of a special chemical present in its body. Interestingly, the butterfly acquires this chemical during its caterpillar stage by feeding on a poisonous weed.
(b) (ii) Weed Calotropis growing in abandoned fields. The plant produces highly poisonous cardiac glycosides and that is why you never see any cattle or goats browsing on this plant. A wide variety of chemical substances that we extract from plants on a commercial scale (nicotine, caffeine, quinine, strychnine, opium, etc.,) are produced by them actually as defences against grazers and browsers.
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संबंधित प्रश्न
Write what do phytophagous insects feed on.
What is ESS?
Tabulate and analysis of two species population interaction.
Rafflesia an arnoldii is an example of ______.
Which of the following is not an example of commensalism?
Give one example for the following:
An organism which can conform
Select the statement which best describes parasitism.
Describe mutualism.
Give one example of camouflage.
Statement I - Calotropis growing in abandoned fields is never consumed by cattle and goats.
Statement II - Calotropis produces highly poisonous cardiac glycosides.
In light of above statements, select the most appropriate answer from the option given below.
