Question

Among the following stenothermal organisms, pick the odd one out:

• A. Reptiles
• B. Insects
• C. Corals
• D. Arctic crustaceans

Answer 1

The correct option is D Arctic crustaceans

Stenothermal organisms are those which can thrive only within a limited temperature range. They could be further categorised into two groups- thermophiles, which can thrive only in high temperatures (at least above ${20}^{\circ }C$), and cryophiles which can thrive only in lower temperatures (below ${20}^{\circ }C$). Corals, some insects and a majority of the reptiles are thermophiles. Salmons, seals and arctic crustaceans are examples of cryophiles.