[Video] Q23: What evidence in the passage best supports the hypothesis that the presence of wnt and fgf8 proteins during embryonic development is necessary for the formation of beaks?

Explanation for Question 23 From the Reading Section on the 2021 May Sat (International)

Hey guys. So question 23 says what evidence in the passage best supports 2 the hypothesis that the presence of Wnt and F G F eight proteins 3 during embryonic development is necessary for the formation of beaks. 4 So you hit a question like this, you might get, start getting a little 5 nervous, cause they're throwing all this technical stuff at you wishing to find these 6 items right here, being identified with the formation of beaks during 7 embryonic development. So, you know, we should have find which of these quotes is 8 talking about that in regards to the formation of beaks. 9 Let's just start at the top 37 38. Um, 10 this says, so bowler searched for earlier studies of genetic pathways that control 11 development of these bones. That's all it's saying right there. 12 Cause it had anything to do with those two things we talked about. 13 No. So we can be pretty confident in just getting rid of those right 14 now. 15 Let's go to 46 to 48, starting with in mammals, 16 in mammals, lizards, turtles, and alligators. 17 In contrast activity of the Wnt. 18 Gene is the highest on the side of the embryonic face. 19 So this right there, again, doesn't seem to have anything to do with the 20 formation of beaks. In fact, 21 all the animals that just talked about don't have beaks, lizards, 22 turtles, and alligators, even though they are talking about Wnt, 23 they're not talking about it being necessary for the formation of beaks. 24 So you can get rid of that. So get 49 to 51, 25 it...