Answer:
The rough edges of the plates get trapped on each other as they pass. This slows the motion on the border as the remaining plates continue to move. Pressure builds up, and when the plates get too much, the hard, fractured lithosphere breaks unexpectedly, possibly resulting in an earthquake.
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I think that having an extra chromosome 21 is tolerable to the point that someone with this condition can survive to maturity because it does not replicate.
There should only be a pair of chromosome 21. In the event that there are 3 chromosome 21, the person that has this extra chromosome has Down syndrome. Changes in the number and structure of this chromosome may result to delayed development, intellectual disability, but not immediate death.
Answer:brightly colored males
Explanation: for apex
the cell theory explains & states this