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CNMS ICSE - 7 Std
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Chapter: 05. Respiration In Plants

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We are advised not to sleep under a tree at night because plants take in oxygen and give out carbon dioxide at night, which increases the concentration of carbon dioxide under the tree.
Aerobic respiration is the complete breakdown of glucose into carbon dioxide, water, and energy inside cells in the presence of oxygen.
Root hairs take up oxygen by extending into the air spaces present between soil particles.
Yeast is used to make wine and beer because it respires anaerobically to yield ethyl alcohol and carbon dioxide as end-products.
The word equation for respiration is: Food (Glucose) + Oxygen → Energy + Carbon dioxide.
They are opposite processes because photosynthesis synthesizes glucose and stores solar energy, whereas respiration breaks down glucose to release stored energy.
The two major steps involved in aerobic respiration are breathing (the exchange of gases) and cellular respiration (the oxidation of food inside cells).
Plants respire to break down glucose and release energy, which is needed by every cell to perform life-sustaining activities.
Gaseous exchange in leaves takes place through tiny pores called stomata that open into air cavities.
Anaerobes are organisms, such as yeast, certain bacteria, and parasitic flatworms, that can survive and obtain energy in the absence of oxygen.
Photosynthesis takes place inside the chloroplasts, whereas aerobic respiration is completed inside the mitochondria of the cell.
The end-product of anaerobic respiration in animal muscle cells is lactic acid.
Old woody stems facilitate gas exchange through specialized pores called lenticels that develop beneath the bark.
Anaerobic respiration is the incomplete breakdown of glucose without the use of oxygen to produce ethyl alcohol, carbon dioxide, and energy.
No energy is released during the mechanical process of breathing, whereas energy is released and stored as ATP during the biochemical process of cellular respiration.
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