<p>Would you consider Bio E and M two different tests (like Math 1 and Math 2) even though they share the same questions. I was just wondering. I took M earlier and E today, so would that just be like taking two subject tests or like 1?</p>
<p>It would be like taking one. </p>
<p>Bio E and M share a huge majority of questions.</p>
<p>The Biology test has a total of 80 questions, out of which 60 of them are shared by E and M. After the 60 questions, the test splits up into Ecology (20 questions) and Molecular Biology (20 questions). You may only take 1 biology test per test date, so you must choose E or M.</p>
<p>Ecology and molecular biology aren’t completely different. However, with previous test experience and practice tests, I found that ecology was generally easier for me (it is different for everyone), concentrated on animal behaviour, evolution, plants, biomes, nitrogen/phosphorus cycles, and taxonomy (kingdom, phylum, class, etc.). Molecular biology focuses a lot more on biochemistry and had a lot more lab-type questions in practice tests I took.</p>