<p>@alyssa193 it’s that the left and right are separated. The purpose of the valve is to keep blood from flowing back so there’s no way they are two way.</p>
<p>yes, @biofun, but if it was, indeed, intracellular communication, that means that the cells of the eukaryotic organism comunicate with eachother, while unicellular organisms have no other cells to intracellularly communicate with</p>
<p>@alyssa that’s what i said, but either one is anatomically perfectly correct, you know it may be THE or ONE of the “thruways” they put in the experimental sets to bog people down and waste time.</p>
<p>@satman no it was convergent not divergent evolution</p>
<p>@satman i’m about 99% sure it was specialization/differentiation, that’s one of the key hallmarks of multicellular organisms</p>
<p>wasn’t the dessert plant one about how two different species of cactus became similar. Because if it was, then it’s convergent evolution</p>
<p>shhhhhhhhhhhh</p>
<p>@satman yes you’re right, and i think i’ve solved the heart two way or separation problem. It’s two way answer choice because left/right heart are not completely separated, they are connected by mesentary tissue</p>
<p>@satman1111</p>
<p>I’m pretty sure the desert plant one was about how there were two plants. They weren’t related at all, but they both were adapted for the desert environment.</p>
<p>@yalehopeful if you mean the two way for pulmonary and aorta then yes</p>
<p>Hey what was the answer for the Homologous structure?</p>
<p>@asiansexy i put mutations, repressors don’t change, they are coded by hox genes which are HIGHLY CONSERVED and unlikely to mutate, it’s promoters dna mutations where repressor bind that counts :). So yeah im almost certain it was mutation.</p>
<p>I think the heart one might be that it is separated. One of the key qualities of being human is that we have a two sided heart, one that pumps to the lungs, and another that pumps to the body. Other organism only have one part of the heart, that passes it through the lungs, then through the body. Having two separated parts of the heart allows us to have more pressure of blood throughout the whole body. Yes, they are separated by heart tissue, but they do not connect, unless you go through the lungs first</p>
<p>I put the answer about wings for that one, but I really wasn’t sure about that one.</p>
<p>@satman yes at first after the test i thought it was more plausible but i’m having trouble negating the two way pulmonary and aorta one.</p>
<p>okay, can we seriously go back to he beetle question. We still don’t have a definite answer</p>
<p>was one of the answers a dog paw and some animal flipper?</p>
<p>its type 3. end of story.</p>
<p>@asiansexy it didn’t say valves, it just said aorta and pulmonary something (vessels or circulation)</p>
<p>[The</a> Heart](<a href=“http://www.biosbcc.net/doohan/sample/htm/heart.htm]The”>http://www.biosbcc.net/doohan/sample/htm/heart.htm)</p>
<p>Pretty sure that valves are one way valves, not two way. Imagine your blood flowing in the wrong direction! I don’t think that would work well.</p>