Educational worksheet on plant responses to stimuli, including phototropism, hydrotropism, geotropism, thigmotropism, and nastic responses, with diagrams and fill-in-the-blank questions.

- Phototropism: Stimulus - Light; Part involved - Shoots; Importance - Allows plants to maximize sunlight absorption for photosynthesis.
- Hydrotropism: Stimulus - Water; Part involved - Roots; Importance - Enables roots to grow towards water sources for hydration and nutrient uptake.
- Geotropism: Stimulus - Gravity; Part involved - Roots (positive) and Shoots (negative); Importance - Ensures roots grow downward for anchorage and water/nutrient absorption, while shoots grow upward for light exposure.
- Thigmotropism: Stimulus - Touch or physical contact; Part involved - Tendrils or stems; Importance - Allows climbing plants to attach to supports for structural stability and better access to sunlight.
- Nastic Responses: Stimulus - Various stimuli like touch, light, or temperature changes; Part involved - Leaves or petals; Importance - Rapid, non-directional movements that protect the plant or aid in pollination (e.g., closing of Mimosa pudica leaves when touched).

Shoots show:
a) positive Phototropism
b) negative geotropism
c) negative hydrotropism

Roots show:
a) negative Phototropism
b) positive geotropism
c) positive hydrotropism