BIOLOGY DUAL ENROLLMENT VERSION
12th Edition
ISBN: 9780136681311
Author: Urry
Publisher: PEARSON
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Chapter 10, Problem 9TYU
EVOLUTION CONNECTION Photorespiration can decrease soybeans’ photosynthetic output by about 50%. Would you expect this figure to be higher or lower in wild relatives of soybeans? Why?
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Photosynthesis can be measured by measuring the rate of oxygen production. When plants are exposed to light of wavelength 680 nm, more oxygen is evolved than if the plants are exposed to light of 700 nm. Explain.
For photosynthesis lab in biology
1) This lab uses spinach leaves. Name another plant that would make an interesting comparison to spinach. Explain why you think this leaf would provide an interesting comparison
2) The lights used in this experiment are 60W. What would you predict the effect of having stronger or weaker wattage bulbs would be on your results? Explain.
3)This lab uses 0.2% sodium bicarbonate. What would you predict the effect of raising or lowering the percentage would be on your results? Explain.
4)What are TWO other things that might be manipulated in an experiment using this same protocol other than the type of leaf, percent sodium bicarbonate, and wattage of light bulb?
5) What key thing do you have to look for on the graph to know for certain that your treatment has caused a significant effect?
Plants have evolved by developing mechanisms that promote entry of CO, into the Calvin Cycle (CC) to limit
photorespiration when environmental conditions tend to favor the latter. This is because photorespiration 1) is
energetically inefficient (consuming more ATP than the CC alone) and 2) it does not produce any sugars that
can be "fed" into cellular respiration to produce lots more ATP.
A) Under what environmental conditions does photorespiration "outcompete" that of the CC? Specifically, what
mechanism is responsible for committing the cell to photorespiration and what type of plant does not have any
"safeguards" to ensure that the CC is performed rather than photorespiration?
B) Describe the mechanisms employed by two types of plants to minimize photorespiration and ensure that the
CC is carried out even when environmental conditions are not in their favor. Be sure to identify 1) the type of
plant, 2) its natural environment and how it affects the plant's ability to perform the CC,…
Chapter 10 Solutions
BIOLOGY DUAL ENROLLMENT VERSION
Ch. 10.1 - Prob. 1CCCh. 10.1 - Prob. 2CCCh. 10.2 - Prob. 1CCCh. 10.2 - Prob. 2CCCh. 10.2 - Prob. 3CCCh. 10.3 - Prob. 1CCCh. 10.3 - Prob. 2CCCh. 10.3 - Prob. 3CCCh. 10.4 - Prob. 1CCCh. 10.4 - Prob. 2CC
Ch. 10.4 - Prob. 3CCCh. 10.4 - Prob. 4CCCh. 10.4 - Prob. 5CCCh. 10.5 - Prob. 1CCCh. 10.5 - Prob. 2CCCh. 10.5 - Prob. 3CCCh. 10.5 - Prob. 4CCCh. 10.6 - Prob. 1CCCh. 10 - Prob. 10.1CRCh. 10 - Prob. 10.2CRCh. 10 - Prob. 10.3CRCh. 10 - Prob. 10.4CRCh. 10 - Prob. 10.5CRCh. 10 - Prob. 10.6CRCh. 10 - The light reactions of photosynthesis supply the...Ch. 10 - Which of the following sequences correctly...Ch. 10 - How is photosynthesis similar in C4 plants and CAM...Ch. 10 - Prob. 4TYUCh. 10 - Prob. 5TYUCh. 10 - In mechanism, photophosphorylation is most similar...Ch. 10 - Prob. 7TYUCh. 10 - Prob. 8TYUCh. 10 - EVOLUTION CONNECTION Photorespiration can decrease...Ch. 10 - SCIENTIFIC INQUIRY MAKE CONNECTIONS The following...Ch. 10 - Prob. 11TYUCh. 10 - SYNTHESIZE YOUR KNOWLEDGE Watennelon snow in...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In an experiment conduct to know the effect of light intensity on the rate of photosynthesis in spinach leaves, with the use of 5 ml of a 0.2% sodium bicarbonate (NaHCO3) and a solution of dilute drop of liquid soap. in relation this experiment, state an hypothesis that predicts the relationship between light intensity and the rate of photosynthesis. Identify independent and dependent variables. What is your control group, and why is this an appropriate control?arrow_forwardThe substance dichlorophenyldimethylurea (DCMU) is an herbi- cide that inhibits photosynthesis by blocking electron transfer between plastoquinones in photosystem II. (a) Would you expect DCMU to interfere with cyclic photophos- phorylation? (b) Normally, DCMU blocks Oz evolution, but addition of ferri- cyanide to chloroplasts allows Oz evolution in the presence of DCMU. Explain.arrow_forwardSolar-induced fluorescence can be used to infer net photosynthesis. This is because this solar-induced fluorescence is able to measure the light that is used by the chlorophyll-a pigment (650-850nm). There is a linear relationship between this solar-induced fluorescence and the gross primary production of a plant. How does measuring chlorophyll-a pigment with solar-induced fluorescence help us infer net photosynthesis?arrow_forward
- As energy passes from blue-absorbing chlorophylls down to red-absorbing chlorophylls, surprisingly, no energy passes from lower energy-absorbing pigments back to higher ones (in other words, the process is irreversible). Why might that be?arrow_forwardLight that the chlorophyll-a pigment uses may be measured by the solar-induced fluorescence (650-850nm). This fluorescence caused by the sun and a plant's gross primary output are correlated linearly. Why does this reasoning shows that solar induced fluorescence can be used to infer net photosynthesis?arrow_forwardIt is possible that you recently discovered a new species of plant in the Amazon Rainforest. It is surprising that this plant can survive with limited sunlight in the diverse ecosystem of the Amazon. The plants unique quality has the potential to have a significant impact on both the realm of ecology and diverse sectors. Your primary research focus is now to investigate the efficiency of photosynthesis in this plant, specifically analyzing the structure of the chloroplasts and the distribution of pigments (chlorophyll and carotenoids) utilizing microscopy techniques. Which method is better for looking at the structure of chloroplasts in this plant, confocal scanning microscopy (CSM) or transmission electron microscopy (TEM). Consider the principles, advantages, and limitations of each method and align them with the goals of your research to justify your answer.arrow_forward
- Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?arrow_forwardWhat is the significance that the combined absorption spectra of chlorophylls a and b roughly match the action spectrum of photosynthesis? Would photosynthesis be more efficient if their individual absorption spectra coincided exactly?arrow_forwardIn the photosynthesis lab, a group of students found that in the blue light condition, there was a change in absorbance (ΔA620) of 0.324 in extracted spinach chloroplasts. The students later went on a hike and located a plant they had never seen before and were interested in how the photosynthesis rates would compare to their experiment with spinach chloroplasts. They extracted chloroplasts of the unknown green-leaved plant and exposed them to the same experimental conditions as before. The students calculated the ΔA620 to be 0.100. Which plant (spinach or unknown) has the highest rate of photosynthesis? Explain your answer using evidence, being sure to demonstrate your understanding of the dependent variable.arrow_forward
- It is possible that you recently discovered a new species of plant in the Amazon Rainforest. It is surprising that this plant can survive with limited sunlight in the diverse ecosystem of the Amazon. The plants unique quality has the potential to have a significant impact on both the realm of ecology and diverse sectors. Your main goal is now to investigate the efficiency of photosynthesis in this plant, specifically analyzing the structure of the chloroplasts and the distribution of pigments (chlorophyll and carotenoids) utilizing microscopy techniques. Both conventional fluorescence microscopy (FM) and CSM possess the capability to identify the distribution of pigments, specifically chlorophyll and carotenoids. How does the process of stimulating fluorescence and detecting fluorescence differ between these two microscopy techniques? Given these disparities, which approach is more likely to yield superior outcomes for your research? Could you please explain, taking into consideration…arrow_forwardMagaia et al. illustrated in Figure 2 the relationship of photosynthetic of temperature rate and respiration rate of C3 plants as a function (2015). Which process hampers the carbohydrate synthesis when the temperature exceeds 30°C? respiration photosynthesis 0 10 40 50 20 30 temperature C Figure 2. Relationship of photosynthetic rate and respiration rate in response to temperature. Ⓒ Magaia et al., 2015 O a. Light-dependent reaction O b. Light-independent reaction O c. Photorespiration O d. Photolysis of water ratearrow_forwardEVOLUTION CONNECTION Photorespiration can decreasesoybeans’ photosynthetic output by about 50%. Would youexpect this figure to be higher or lower in wild relatives ofsoybeans? Why?arrow_forward
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