Which is a process that causes an organism’s poorly suited characteristics to disappear?

death rate

adaptation

natural selection

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.