EK FL1 Bio Q- how to go about reading these graphs?

[jokers123]

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I can't quite understand how to read these graphs in order to answer the question. And I don't quite understand the answer explanation they give. Any help here? Pretty please?

These are the graphs from the experiment the question refers to:

Question is:

 

[nomdeplume1234]

I had difficulty reading those graphs too. "opposite effects in the different germ layers." - opposite effects of what? low mesoderm and endoderm expression of what?

 

[LakridsA]

I had trouble with those graphs as well and got that question wrong

 

[Quinoline]

I think the Y axis of the graphs is essentially how much differentiation there was into a particular germ layer. So the most differentiation into mesoderm occurred under the 3rd conditions, the most ectoderm under none, and the most endoderm under the 4th conditions. From this I think that you can argue that the 3 germ layers differentiate best under different conditions, and they do not differentiate well under the conditions that the other layers do differentiate well in.