NEET BIOLOGY

Detailed explanation-1: -ectotherm, any so-called cold-blooded animal-that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates.

Detailed explanation-2: -Ectotherms depend mainly on external heat sources, and their body temperature changes with the temperature of the environment. Animals exchange heat with their environment through radiation, conduction-sometimes aided by convection-and evaporation.

Detailed explanation-3: -Amphibians and reptiles are ectotherms that control their body temperature through external sources such as basking in the sun to warm up. Ectotherms are sometimes known as “cold-blooded” animals, but this is not an accurate term since the blood of a snake basking on a hot rock during a summer afternoon is not cold.

Detailed explanation-4: -In vertebrates, endothermy is typically associated with birds and mammals while fishes, amphibians, and reptiles are generally typified as ectotherms.

Detailed explanation-5: -Fish are ectotherms so that their body temperature fluctuates with the temperature of the surrounding water.