According to charles darwin what is one reason that not all organisms survive in nature

Dna is colied into chromosomes in a cell

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

Isolated volcanic peaks on the ocean floor are