I think its called a <span>volcanic neck.</span>
Early in mitosis, during prophase and prometaphase, the nucleus, nucleolus and nuclear envelope begin to dissolve in preparation for cell division. During telophase, which is the final stage in mitosis,, there is a reversal of effects of prophase and prometaphase; nucleus, nucleolus and nuclear envelope are again formed.
Appalachian Mountains are a part of the Lithosphere
Dinking, Breathing, Digesting.
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I believe the answer is "biodegradable". Hope this helps!