Gravitropism
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Example:
Imagine you're trying to organize a messy room, with books scattered everywhere and clothes piled on the floor. Just as you instinctively know to place books on the shelves and clothes in the closet, plants have an inherent response to gravity that directs their stems to grow upwards and roots to grow downwards. In this analogy, the shelves represent the upward growth of stems seeking light, while the closet symbolizes the downward anchoring of roots into the soil, both guided by a natural sense of direction like your sense of tidying up.
Practice Version
Gravitropism: The growth of plants caused by gravity, stems grow upwards and roots grow downwards. Gravitropism is how plants sense gravity to direct their growth.