A clade is a group of species that includes an ancestral species and all of its descendents
Answer:
destructive force breaks down features of earth's surface/ constructive forces build up features of earth's surface
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Explanation:
Avascular necrosis is basically the death of bone tissue due to a lack of blood supply. Also known as osteonecrosis, it can lead to tiny breaks in the bone and the bone's eventual collapse. A broken bone or dislocated joint can interrupt the blood flow to a section of bone.
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