1) is the first one : the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring
2) is the third one : they have identical physical characteristics
3) is the second one : the populations are isolated and thus do not interbreed .
hoped it helped !!!
Answer:
electromagnetic waves need a medium to travel through
Answer:Dark minerals rich in iron and magnesium separate from light minerals rich in silica and aluminum.
Explanation: Metamorphic rocks are rocks formed as a result of the transformation of other existing rocks which can be Igneous or Sedimentary rocks,this transformation process is called METAMORPHISM. During metamorphism,rocks under Serious levels of stress which can lead to the separation of materials.
During this separation process,Dark minerals rich in iron and magnesium are separated from light minerals rich in silica and aluminum.
