In the process of embryonic development, which stage comes first?
a. blastocyst
b. morula
c. gastrula
d. blastocoel

Where can dna be found in a prokaryotic 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

How does secondary succession differ from primary succession?