NCERT Class 10 science sample question paper and answer 2023-2024
What would happen if green plants disappear from earth. How do leaves of plants help in excretion?
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If green plants were to disappear from Earth, it would have catastrophic consequences for the planet’s ecosystem and all life forms that depend on them. Green plants, particularly through the process of photosynthesis, play a crucial role in producing oxygen and converting carbon dioxide into organic compounds. This process is the foundation of the food chain, as it provides energy and nutrients for other organisms. Additionally, plants contribute to stabilizing the climate by absorbing carbon dioxide, a greenhouse gas that contributes to global warming.
Without green plants, oxygen levels would decline, leading to a shortage of breathable air for many organisms. The entire food web would collapse, affecting herbivores, carnivores, and omnivores alike. The extinction of plant-dependent species would have a cascading effect throughout ecosystems.
Regarding your second question, plants do not have a traditional excretory system like animals, but they do have mechanisms to eliminate waste products. One of the primary ways plants excrete waste is through the stomata, small pores on the surface of leaves and other plant organs. Stomata allow for the exchange of gases, including the release of oxygen produced during photosynthesis and the uptake of carbon dioxide for photosynthesis.
Plants also excrete waste substances through the roots, where they release various compounds into the soil. These compounds may include organic acids, ions, and other metabolic byproducts. The excretion of these substances helps regulate the plant’s internal environment and interactions with soil microorganisms.
In summary, while plants do not have a dedicated excretory system like animals, they have evolved mechanisms, such as stomata and root exudates, to manage waste products and maintain their physiological balance.
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