Consider the following : 1. Butterflies 2. Fish 3. Frogs How many of the above have poisonous species among them ?

1. A. Only one
2. B. Only two
3. C. All three
4. D. None

Answer: C

Explanation

All three categories listed contain species that are poisonous or venomous: 1. Butterflies: Some butterfly species, like the African giant swallowtail (Papilio antimachus), are known to be highly poisonous, containing cardiac steroid toxins that deter predators. 2. Fish: Many fish species are venomous, meaning they can inject toxins, often through spines. A prominent example is the Reef Stonefish, which has highly toxic venom. 3. Frogs: Numerous frog species are poisonous, secreting toxins from their skin (e.g., poison dart frogs). Additionally, some species, like Bruno’s casque-headed frog, are venomous, possessing bony protrusions to deliver their toxins. Therefore, all three organisms listed have poisonous or venomous species among them. This question tests general knowledge about biodiversity and animal characteristics, which is part of the Environment & Ecology syllabus.