Which statements are true about molecules? Select all that apply.
A. They are a group of atoms that are strongly joined.
B. They always contain only one type of atom.
C. They always contain different types of atoms.
D. They are the smallest unit of an element or a compound.

Did you know that a single bee would have to go to over 2 million flowers to make a single pound of honey?

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which is the graph of the piecewise function f(x)? f(x) = image for option 1 image for option 2 image for option 3 image for option 4