The directional movement of a seedling, such as the root going down and the stem coming up, is a result of growth. If growth is prevented, the seedling will not display the expected movement.
Why is it mentioned that the directional movement of a seedling is associated with growth, and what happens if growth is impeded?
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The directional movement of a seedling, such as bending towards light (phototropism), is associated with differential growth rates. Cells on one side elongate more than those on the other, causing curvature. This growth response allows the plant to optimize light absorption. If growth is impeded, the seedling may fail to exhibit the desired directional movement. Factors like insufficient light, physical barriers, or hormonal imbalances can hinder growth. Impeded growth may lead to stunted development, compromised adaptation to environmental stimuli, and decreased overall fitness, as the plant cannot effectively adjust its orientation to optimize resources.