In humans, the is the structural basis on which the mesoderm migrates to form the umbilical cord, which attaches the embryo to the placenta.

format change of dna.  

silt loam

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the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.

b. climate change will cause an increase in biodiversity of all ecosystems.

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