Answer:
Mice and rats make up approximately 95% of all laboratory animals, with mice the most commonly used animal in biomedical research.
The answer is: an "instinct" .
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I THINK THE ANSWER IS ::Tissues composed of more than one cell type are generically referred to as complex tissues. Xylem and phloem are the two most important complex tissues in a plant, as their primary functions include the transport of water, ions and soluble food substances throughout the plant.
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