<p>Actually, IceQube, the answers for that question only included four organisms each. So you didn’t specifically need to know each organism’s appearance on earth. It’s hard to explain but there were five organisms in the diagram. Each answer choice included only FOUR organisms. That means it was easier to choose the correct answer by knowing the general evolutionary progression. I totally agree with Lanayru and AstroBlue.</p>
<p>Also, starfish and sea stars are the same organism…and also, none of the names were even mentioned! There were only pictures of organisms (in the diagram).</p>