My mom has a pergola and every year, the grape vines will wrap itself around it. Sometimes it reaches for objects that are leaning against it (even the chairs!) or it will even grab other plants that aren’t directly towards the sunlight.
How do they know that they can grab these objects as well instead of just wrapping itself around the pergola?
In: Other
They might not have eyes in the way you imagine, but they certainly have the ability to detect both light and the direction of gravity, as well as the presence of nutrients.
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