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Cellular Respiration Lab Report

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Recommended: Overview cellular respiration chapter 9

Seed type and cellular respiration All cells perform cellular respiration to maintain homeostasis and growth. Plants can produce sugar from suns energy, when they need energy they metabolize stored sugars through cell respiration. Plants need the energy to perform different task such as transportation or growth. Similarly to human cell respiration, cellular respiration rate in plants isn’t always consistent and depends on many other factors. After a seed is dropped from plant it goes into a resting period (dormacy) where the stored energy is released very slowly. As their survival depends on it seeds, seeds can detect the quality of light or composition of light. Some seeds have to wait for a long period of time before they are able to germinate, during this time period they are not able to nurture itself because of the lack of leaves. For the seed to stay alive and grow during that time it has to use stored energy reserves and undergo cellular respiration. Seed suppliers measure cellular respiration rate to determine if dormant seeds are still viable and can be used for cultivation. When plants use sugars stored in their leaves or seeds they undergo cellular respiration. Sugar + Oxygen Carbon dioxide + Water + Energy (ATP) …show more content…

I will place the seeds into tubes that contain calcium hydroxide, and invert them in to beakers with water right after. Calcium hydroxide will react with carbon dioxide that is produced and remove the gas from the test tube air space. As seeds are respiring they are absorbing oxygen and respiring carbon dioxide, but the carbon dioxide is absorbed by the calcium hydroxide. As a result of these reactions the air in these tubes decreases and the water increases. This shows us a visible indication of occurring

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As stated in the background of the lab, "seeds are considered to be in a period of dormancy, where they metabolize stored energy at a very slow rate while the seed is still considered alive" (Hands On Labs). During germination, the developing plant embryo uses the stored food supply in the seed for cellular energy and growth. Thus, cellular respiration is taking place as the seeds grow. Without water the seeds cannot begin germinating thus the seeds in test tube N did not undergo photosynthesis(Hands On Labs). B. Were the seeds in the “G” tube undergoing both photosynthesis and respiration, only photosynthesis, or only respiration?

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