1). secondary; physical and thermal and radiological
2). primary; chemical radiological
3). secondary; physical and biological
The majority of mutations have neither negative nor positive effects on the organism in which they occur.
Answer:
Because of the change in density. Oceanic-continental convergance allows for 1 plate to slide under while continental to continental can not slide under and thus they collide froming features like mountins and other stuff.
explanation:
