<span>A callus is important to a healing fracture because it encloses the fracture site, creating a temporary bridge between the bones. This is important to facilitate healing and repair for the bone. It allows the bones to slowly grow back together, and it is eventually replaced with bone tissue and reabsorbed into the body over time.</span>
Population is the term that is used to describe a group of arctic foxes that live in part of Alaska's Arctic National Wildlife Refuge. The correct option among all the options given in the question is the third or the second last option. The area covered by Arctic National Refuge is approximately 19.6 million acres. It has a variety of wild animals living in it.
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Answer:
There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions.
Explanation: