<p>@goldy
you’re right about the fish heart because fish use countercurrent system for co2 and o2 exchange</p>
<p>i still don’t get the polydactyl cuz the question did not ask whether it was dominant or recessive. (it said dominant- 100% sure) it actually how many kids get it and i said: all of the kids -answer choice A</p>
<p>structure 5 was the lungs.</p>
<p>structure 5 was the highest one with c02/02 arrows</p>
<p>but if we determined it was a fish, how could it be the lungs?</p>
<p>so i looked up polydactyl and it says that its recessive for white kids and dominant for black kids. </p>
<p>did the damn question specify race, i can’t remember.</p>
<p>also, biologygenius:</p>
<p>the question didn’t specify if the parents were homo/heterozygous.</p>
<p>if they were Pp x Pp, some of the kids could’ve been normal.</p>
<p>@biology- I think you’re right about polydactyl. I know I was just mixing that question up with something else entirely.</p>
<p>most oxygen was the one that was in the other side of the valve (the other loop)</p>
<p>^^No it didn’t specify</p>
<p>@golfer, it was obvious that it was lungs… I think</p>
<p>^^lol, ***? haha. wikipedia says dominant.</p>
<p>But my point is this. If it is a fish circulatory system, which it is, then the sight of gas exchange is the gills. fish don’t have lungs. so how could it be the site of gas exchange (the gills)</p>
<p>how about the overheated power plant then oxygen dissolved question, whats the answer</p>
<p>polydactyl is in ap barrons biology as autosomal dominant (no question about it)
just that many people don’t have 6 fingers cuz it is expressed rarely</p>
<p>they weren’t lungs, it was a heart.</p>
<p>and biologygenius, did you read my last post?</p>
<p>@golfer</p>
<p>I think it is because it asked what is MOST analgous to dog lungs? Hence the area where CO2 became O2, there were 2 areas but only one was numbered.</p>
<p>LUNGS? HEARTS? WHATEVER… I FORGOT :P</p>
<p>Justin Bieber
i put pollution for the overheated power plant but im not sure</p>
<p>btw can i get ur autograph?</p>
<p>oh. if it said that, then i may have put the gills. idk but i remember thinking it was weird.</p>
<p>^i put pollution too</p>
<p>I put pollution for the phosphates? o_O</p>
<p>dogs (mammal) have lungs to breath
frogs (amphibian) have skin to breath
fish (fish) have gills to breath
cleared?</p>
<p>forget what i said. i put phosphates as pollution.</p>
<p>^Me too.
What was the overheating answer, then? I can’t remember.</p>