Consider the following :
- 1.Butterflies
- 2.Fish
- 3.Frogs
How many of the above have poisonous species among them ?
Show answer
Answer: C. All three groups have poisonous species. Monarch and some swallowtail butterflies store plant toxins and are poisonous to predators. Pufferfish contain tetrodotoxin. Poison dart frogs carry strong skin toxins. So all three.
Watch for: Students readily accept poisonous frogs and fish but forget butterflies like the monarch that are toxic to eat.
Why the other options are wrong
- A. Wrong because butterflies, fish and frogs all include poisonous species.
- B. Wrong because all three groups include poisonous species.
- D. Wrong because monarch butterflies, pufferfish and poison dart frogs are all poisonous.
Source to check: Encyclopaedia Britannica entries 'Monarch butterfly', 'Puffer' and 'Poison frog'
Answer from the official UPSC key. Written and fact-checked by AI against the official key. Spotted a mistake? Report it.