ACT Science 1.3 Conflicting Viewpoint Passage
ACT Science: Conflicting Viewpoint Passage Drill 1, Problem 3. Which of the following reasons would Scientist 2 give to explain why auxin is unlikely to be responsible for this patterning?
|ACT Science||Conflicting Viewpoint Passage|
|Product Type||ACT Science|
Which of the following reasons would Scientist 2 give to explain why auxin is unlikely to
be responsible for this patterning?
And here are the potential answers...
So what's this question asking?
Well, it's asking us how Scientist 2 would show that auxins
are NOT responsible for PIN1 patterning.
Scientist 2 opens up by saying how much he doesn't like the auxin hypothesis.
"The problem with the auxin hypothesis is that auxin signals like a traffic signal:
it tells the cells when to grow and create leaves, but it doesn't tell them where to grow".
Which option matches the reasoning in this statement?
Well, option A is just not true, for starters.
We know that auxin is present in the SAM because auxin allows the shoots...
... the S part of SAM...to grow.
What about B?
"Auxin isn't involved in PIN1 clustering."
Yes, well...this may or may not be true, but it's missing something.
B is the conclusion, but it doesn't have the reasoning to go with it.
"Auxin isn't directional, so it is difficult to see how it would cause PIN1 to cluster."
Yes! This matches what Scientist 2 said about auxin not helping with directions.
If auxin doesn't have the ability to tell the PIN1 where to grow, then it can't be responsible
for the specific growing patterns of PIN1.
C's our answer.