Digital ACT Science Practice Question #1540
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Opaque cap on tip prevents bending -> sensor is in the tip.
When the tip is removed or shielded from light with an opaque cap, phototropism ceases. When transparent cap is used, bending occurs. The photoreceptor is in the tip....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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