Both Thermococcus and Thermoplasma are unicellular organisms that can live in extreme environments. Based on the concept of domains, what do they have in common? They both belong to domain Archaea.
They both belong to kingdom Animalia.
They both belong to kingdom Plantae.
They both belong to domain Eukarya.
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answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

answerspecific gravity;