EVERYDAY SCIENCE

Detailed explanation-1: -Poikilotherm is an organism whose internal temperature fluctuates periodically. They are also known as ectotherms.

Detailed explanation-2: -Most ectotherms do regulate their body temperature to some degree, though. They just don’t do it by producing heat. Instead, they use other strategies, such as behavior-seeking sun, shade, etc.-to find environments whose temperature meets their needs.

Detailed explanation-3: -Poikilotherms or ectotherms are those organisms that cannot regulate their body temperature. Oligotherms are organisms that are capable of living in low-temperature conditions.

Detailed explanation-4: -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-5: -An ectotherm (reptile/amphibian) relies primarily on its external environment to regulate the temperature of its body. Endotherms (birds) are able to regulate their body temperatures by producing heat within the body.