A polygenic trait is a trait controlled by many (poly) genes. Human skin color is an example; it thought to be the controlled by about 12 genes.
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B. sulfur tetrafluoride + water → hydrogen fluoride + sulfur dioxide
The earth is divided into four main layers: the solid crust on the outside, the mantel, the outer core and the inner core. out of them, the crust is the thinnest layer of the earth, amounting for less than 1% of our planet's volume. hope this helps!
Having white fur in the winter to blend in with the snow
A lipid containing a phosphate group in it's molecule.