In most cells, (mRNA, a protein, DNA) directs the production of a
molecule of (mRNA, a protein, DNA)
which then enters a ribosome. The
ribosome produces the final product, (mRNA, a protein, DNA)
Retroviruses do the opposite. They use the enzyme reverse
transcriptase to use a template of (mRNA, a protein, DNA)
to produce (mRNA, a protein, DNA)

What feature of cell theory is best demonstrated in the image

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the