Match the layers of the earth to their proper composition. inner core a) liquid rock
asthenosphere b) solid iron
lithosphere c) liquid iron
outer core d) solid rock

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

What controls activities within a eukaryotic cell?

What type of pollution does household garbage cause