बाहरी वातावरण में परिवर्तनों के बावजूद अनुकूल आंतरिक स्थितियों को बनाए रखने की प्रक्रिया क्या कहलाती है?

What term describes animals that regulate their body temperature internally through metabolic heat?

In the context of marine and aquatic ecosystems, how is the phenomenon of bioluminescence precisely defined?

The renal portal system is absent in which of the following animal groups?