In a germinating seed the downward growth of roots and upward growth of leaves and stems are the plants responses to?

In a germinating seed, the downward growth of roots and the upward growth of leaves and stems are responses to gravity, known as gravitropism. Roots exhibit positive gravitropism, growing downward towards the gravitational pull, which helps anchor the plant and access water and nutrients. In contrast, stems and leaves display negative gravitropism, growing upward away from gravity to maximize light exposure for photosynthesis. These coordinated responses ensure the plant establishes a stable foundation while reaching for essential resources.