🦊 In this GCSE Biology video, we discuss gravitropism, a growth response of plants to gravity, explaining that roots are positively gravitropic, meaning they grow towards gravity due to the accumulation of auxin hormone on the lower side, which slows cell growth and causes the root to bend downwards. In contrast, shoots are negatively gravitropic and grow away from gravity because auxin accumulates on the lower side of a horizontally growing shoot, promoting faster cell elongation there and causing the shoot to bend upwards. This hormonal response enables plants to orient their roots into the soil and shoots towards the sunlight, regardless of their initial growing position.

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