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15. (a) What is phototropism? (i) Name a part of a plant that responds positively to phototropism - Leaving Cert Biology - Question 15 - 2021
Question 15
15. (a) What is phototropism? (i) Name a part of a plant that responds positively to phototropism. (iii) What benefit does phototropism give to a plant?
Worked Solution & Example Answer:15. (a) What is phototropism? (i) Name a part of a plant that responds positively to phototropism - Leaving Cert Biology - Question 15 - 2021
Step 1
What is phototropism?
Answer
Phototropism is the growth response of a plant in relation to the direction of light. In this phenomenon, plant stems and leaves grow towards light sources, maximizing their exposure to sunlight, which is essential for photosynthesis. This adaptive behavior ensures that plants are able to optimize their light absorption, promoting healthier growth and development.
Step 2
Step 3
What benefit does phototropism give to a plant?
Answer
Phototropism benefits a plant by enhancing its ability to perform photosynthesis. By growing towards light, plants can maximize their exposure to sunlight, which is crucial for converting light energy into chemical energy. This leads to improved growth rates, increased biomass, and ultimately better reproductive success due to a higher energy reserve.