PLANT PHYSIOLOGY
RESPIRATION IN PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water enters the plant through the surface of the leaf for transpiration
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Gases for photosynthesis are exchanged through the surface of the leaf
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Energy for cellular reproduction is absorbed through the surface of the leaf
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Carbon dioxide enters the plant through the surface of the leaf for cellular reproduction
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Detailed explanation-1: -Stomata and Gas Exchange Stomata or pores in the leaf surface are surrounded by specialized leaf cells called guard cells (see Figure 3). Guard cells regulate the opening and closing of stomata. Stomata allow oxygen and carbon dioxide to either enter or leave the plant.
Detailed explanation-2: -This evolutionary innovation is so central to plant identity that nearly all land plants use the same pores-called stomata-to take in carbon dioxide and release oxygen. Stomata are tiny, microscopic and critical for photosynthesis. Thousands of them dot on the surface of the plants.
Detailed explanation-3: -Terrestrial plants have stomata on the surface of their leaves. A single stomata is surrounded by two guard cells that change shape in response to environmental factors and open or close the stoma.
Detailed explanation-4: -A pair of guard cells surrounds each stoma, and these cells control the opening and closing of the stomatal pore between them. Guard cells regulate this opening and closing in response to a wide variety of environmental signals, such as day/night rhythms, CO2 availability, and temperature.