The galapagos islands were formed by undersea volcanoes. at first, they had no living organisms. many years later, a wide variety of plant and animal species inhabited the islands. which of these identifies the process by which different species colonize and replace other species?

This process by which an unexploited niche is explored by organisms and then tries to thrive is succession. In this case, primary succession is observed. Thank you for your question. Please don't hesitate to ask in your queries. 

Brother ur in collage do it yourself or i will tell prof. mike

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.