Consider the following: 1. Butterflies 2. Fish 3. Frogs How many of the above have poisonous species among them?
AOnly one
BOnly two
CAll three
DNone
Answer & Solution
Correct answer: C. All three
Answer: C. All three groups include poisonous species.
(1) BUTTERFLIES: Several butterflies are poisonous. Monarch butterflies sequester cardenolide toxins from milkweed they eat as caterpillars. Indian Common Crow and Plain Tiger are also poisonous; predator birds avoid them.
(2) FISH: Many fish species are poisonous. The pufferfish (Tetraodontidae) contains tetrodotoxin; stonefish, lionfish carry venomous spines; certain catfish are venomous.
(3) FROGS: Poison dart frogs (Dendrobatidae) of Central and South America are among the most poisonous animals on Earth (batrachotoxin in some species). Several Indian frogs also have toxic skin secretions.
All three groups have well-documented poisonous species.
Source: NCERT Class 11 Biology Ch 4 (Animal Kingdom) / National Geographic species references.
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