One advantage of models is that all the mice are exactly alike except for color, enabling the control of some variables including the one being studied. Models are also easier to work with than live mice. One disadvantage of using models is that they do not have the same smell and behavior as real mice?.

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A team lead by evolutionary biologist  Hopi Hoekstra set out to test the hypothesis that predators are  an agent of natural selection on mouse color. They made 250 plasticine models of mice that were alike in every way except that half were painted white and half were painted brown. Suggest one advantage and one disadvantage of using model mice instead of real mice in this experiment.

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the goblins and dwarves have different perspectives of things. bilbo is a hobbit and goblins dwarves and hobbits all believe and do a different way of living

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.