What are the two main factors in the mantle that contribute to the rock cycle?
A.
weathering and layering
B.
heat and weathering
C.
pressure and heat
D.
layering and pressure

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.