B.plants and water
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The DNA double helix coils around itself simply because it is the most stable way for the atoms to interact. In other words, the DNA molecule naturally is coiled because the chemical bonds are most stable in a helix. This is the primary structure of DNA.
The current maternal blood-screening test is also known as the triple screen test because of the testing of the three substances in the blood of a pregnant woman. These three tested components are the hCG (Human Chorionic Gonadotropin), AFP (Alpha-feto protein), and the estriol.
For the purpose of this triple screen test, the blood is drawn for the expectant mother and then this drawn blood is tested for the listed three components.
Hence, the correct answer is 'it tests for three substances in the maternal blood'.
The composition of magma affects<span> the type of volcanic eruption. ... One key to what makes the eruption unique is the </span>chemical composition<span> of the magma that feeds a volcano, which determines (1) the eruption style ... Viscosity determines what the magma will </span>do. ... What are thecharacteristics<span> of felsic </span><span>lava</span>
Answer: HUHUUHHUHUHUHUHUH
Explanation: