âº a gradual process of change and development. âº biology Evolution is the process by which the physical characteristics of types of creatures change over time, new types of creatures develop, and others disappear. (Definition of âevolutionâ from the Cambridge Academic Content Dictionary Â© Cambridge University Press)
You can remember the difference between endotherms and ectotherms if you remember that endo- means inside endo- = inside and ecto- means outside ecto- = outside, so endotherms generate their own heat from within, and ectotherms get their heat from the outside.
Under Tank Heater: An Under Tank Heater or U.T.H. is a heat pad made especially for small animals and reptiles. An U.T.H. is used to keep the hermit crabs warm by gently warming the air in the tank, in turn warming the sand. You may need a thermostat to regulate the warmth of the tank if the temperature rises above 26.6C or 80F.