Systems of classification show which organisms share more recent ancestors. What is the most accurate system of classification?
A using anatomy
B using DNA base sequences
C using morphology
D using a pedigree diagram

answer; ///(b) it is composed of four protein chains and four heme groups;

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added