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Cellular respiration in plants12/29/2023 The background is divided into three sections. Shown is a graph identifying the levels of photosynthesis and respiration through the day and night. ![]() We call this intensity the light compensation point. There is a specific intensity of light at which the rate of CO2 uptake is the same as the rate of CO2 production. To increase the length of time beyond this requires artificial light. It is generally not possible to increase the number of sunlight hours in a day. Increasing intensity of light can also increase transpiration transpiration. Beyond that point, the extra light energy can damage plant cells. This can increase glucose production, but only up to a certain point. Increasing the intensity or brightness of light.There are two ways to increase the amount of glucose a plant can produce. In other words, the plant must produce more glucose than it consumes. These plants only release oxygen at night when their stomata open.įor a green plant to survive, grow, and reproduce, the rate of photosynthesis must be greater than the rate of cellular respiration. Cacti and similar plants keep their stomata closed during the day to reduce water loss. Not all plants release oxygen during the day. Finally, the word Water has an arrow pointing away from the plant. The phrase Glucose consumed is beside the plant, with no arrows. The phrase Carbon dioxide has an arrow pointing away from a leaf. The word Oxygen has an arrow painting towards a leaf. The labels here are white with pale blue arrows. A full, pale grey moon is in the top right corner. It shows the same plant, with a dark blue sky sprinkled with white stars. The right panel is labelled Night, in the top left corner. Finally, the word Water is above an arrow pointing towards a leaf. Third, the phrase Glucose produced is beside the plant, with no arrows. Next, the phrase Carbon dioxide is beside an arrow pointing towards a leaf. At the top, the word Oxygen is over an arrow pointing away from a leaf. To the right of the plant are four labels. In the top right corner, a pale yellow sun shines down on the plant. The sky behind the plant is pale blue with three small dark blue clouds. In the lower half of the panel is a green plant with pointed oval shaped leaves, growing in a pile of brown soil. The left panel is labelled Day, in the top left corner. Shown is a colour illustration with two panels comparing photosynthesis and cellular respiration. ![]() This is when cellular respiration becomes the dominant process. At night, or in the absence of light, photosynthesis in plants stops. During the day, photosynthesis is the dominant process. A Day in the Life of a Plantīoth photosynthesis and cellular respiration occur within plant cells. Between the two stages are the words Cellular Respiration in large, reddish-brown font. Pointing up from this is a thick reddish-brown arrow labelled Energy (ATP).Īn arrow leads from this illustration back to the first stage: carbon dioxide and water. This is labelled Mitochondrion (plant and animal cells). It appears to be cut in half, revealing a long, thick purple squiggle zig-zagging back and forth through the space inside. Between the chloroplast and this rectangle is the word Photosynthesis, in large green font.įinally, above and to the left ,is an illustration of a kidney-bean shaped structure with a reddish-brown surface. Next, below and to the left is a pale green rectangle with the chemical symbols for oxygen and glucose inside. Above is an illustration of the sun with a yellow arrow pointing down to the surface of the chloroplast. This is labelled Chloroplast (plant cells only). The outer layer of this structure is cut away to reveal a stack of dark green discs. Next, below and to the right, is an illustration of a pale green oval with a flat bottom. ![]() Shown is a colour diagram illustrating the stages in cellular respiration and photosynthesis.įour illustrations are laid out in a loop, joined by curved black arrows pointing clockwise, in a continuous cycle.Īt the top, centre is a pale blue rectangle with the chemical symbols of carbon dioxide and water inside.
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