The tendency of an organism to reproduce and survive in the environment in which they thrive is termed as fitness of that organism.
• The mice are considered to be the second most successful mammal on the planet today.
• Mice possesses the tendency to change with the stresses and environment in which they thrive.
• Due to their close association with humans, house mice possess the tendency to live in very dry or hot conditions or in very cold conditions where they could not survive alone.
• The mice possesses the tendency to reproduce at a very high rate, thus, there are always individuals, which can survive.
• They have the tendency to sense their surroundings like other mammals, they even possess good hearing and vision.
• They have large cup shaped ears, which assists them to sense vibrations of sound.
• They also possess good sense of smell and whiskers that helps them to feel air movements and feel surface textures.
Thus, mice are equipped with several elements that helps them to adapt in the environment in which they live, that is, have increased fitness level.
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