Which characteristic is used to classify metamorphic rocks as foliated or non-foliated? grain size
layer thickness
arrangement of layers
arrangement of grains

If a || b and e || f, what is the value of y ?

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3