An example of a biotic element found in the tropical rain forest biome is a(n) ___. A. palm tree
B. ecosystem
C. thunderstorm
D. soil layer

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

What was darwins theory of common decent

Which of th following best describes how genes produce traits in an organism?