Which phrases are true of only the mantle? check all that apply.
made of three layers
has a tarry layer
made of two layers
has a molten outer layer
has a solid outer layer

What is the mrna strand that would be copied from this dna strand

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

How does deforestation affect the water cycle? a. it increases the amount of runoff b.it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff