Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 30, Problem 2CT
Photosynthesis sustains plant growth, and inputs of sunlight sustain photosynthesis. Why, then, do seedlings that germinate in a fully darkened room grow taller than seedlings or the same species that germinate in full sun?
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Photosynthesis occurs in the chloroplasts packed within the mesophyll cells. Summer leaves are green because they contain about 50 times more chlorophyll than carotenoids. But during the fall, carotenoids have their season of glory because chlorophyll breaks down first, revealing the striking orange and yellow colors of carotenoids, which were there all along. The changes that leaves undergo before they fall off allow the plant to reclaim nutrients from the leaves for storage and use the following spring. How do these nutrients leave the leaf ?
What are the products of the light-dependent reactions of photosynthesis?
1) production of ATP, oxygen, and NADPH
O 2) production of ATP, water, and NADH
3)
regeneration of NAD+
O 4) Production of G3P and ATP
O 5) production of oxygen and NAD+
What is the relationship between light intensity and the rate of photosynthesis. Make a prediction about this relationship, and identify both independent and dependent variables in the prediction.
What will be a suitable hypothesis predict answers for the following: A) what is the rate of germinating peas versus non-germinating peas. B) what is the effect of temperature on germinating peas?
Chapter 30 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Prob. 4DAACh. 30 - Prob. 1SQCh. 30 - Prob. 2SQCh. 30 - Prob. 3SQCh. 30 - _______ is the hormone in most rooting compounds....Ch. 30 - Prob. 5SQCh. 30 - Prob. 6SQ
Ch. 30 - Prob. 7SQCh. 30 - Ethylene differs from other hormones in that it...Ch. 30 - Prob. 9SQCh. 30 - Prob. 10SQCh. 30 - Prob. 11SQCh. 30 - Prob. 12SQCh. 30 - Match the hormone with the description. _____...Ch. 30 - Prob. 14SQCh. 30 - Prob. 15SQCh. 30 - Professional gardeners often soak seeds in...Ch. 30 - Photosynthesis sustains plant growth, and inputs...Ch. 30 - Prob. 3CTCh. 30 - Cattle in industrial dairy farms are typically...Ch. 30 - The oat coleoptiles on the left have been...
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- Photosynthesis ceases when leaves wilt, mainly because(A) the chlorophyll in wilting leaves is degraded.(B) accumulation of CO2 in the leaf inhibits enzymes.(C) stomata close, preventing CO2 from entering the leaf.(D) photolysis, the water-splitting step of photosynthesis,cannot occur when there is a water deficiency.arrow_forwardWould a plant be able to grow to maturity and produce seeds if kept in total darkness? Why?arrow_forwardWhich is an example of Phototropism? A) roots of a plant following water B) plant bending toward the light C) roots growing into the soil D) a venus flytrap capturing a flyarrow_forward
- How do C4 plants minimize photorespiration? Multiple Choice Stomata are only opened at night, storing carbon dioxide in the stroma. During the day, the carbon dioxide is released for photosynthesis. Carbon dioxide is fixed twice in different cells. The Calvin cycle occurs in the bundle sheath cells where oxygen concentrations are lower. Carbon dioxide is fixed twice in different cells so that carbon dioxide does not come into contact with rubisco. Stomata are only opened at night, storing oxygen in malate. During the day, the oxygen is released for photosynthesis. Stomata are only opened at night, storing carbon dioxide in malate. During the day, the carbon dioxide is released for photosynthesis.arrow_forwardWhat is the major trade-off plants face when they undergo photosynthesis? When they open their stomata to let in oxygen, they can lose water. When they open their stomata to release oxygen, they can lose water. When they open their stomata to let in carbon dioxide, they can lose water. When they open their stomata to let in water, they can lose carbon dioxide.arrow_forwardClosed stomata ________. a. limit gas exchange b. permit water loss c. prevent photosynthesis d. absorb lightarrow_forward
- There is a trade-off between photosynthesis and transpiration in leaves because (a) numerous stomatal pores provide both gas exchange for photosynthesis and openings through which water vapor escapes (b) a waxy layer, the cuticle, reduces water loss (c) blue light triggers an influx of potassium ions (K+) into the guard cells (d) leaves of deciduous plants abscise as winter approaches in temperate climates (e) stomata are closed at night, although water continues to move into the roots by osmosisarrow_forwardWhat is/are the differences between photosynthesis and respiration? What is the relationship between respiration and plant growth?arrow_forwardList the three events that occur during the process of photosynthesis. Explain the role of stomata in this process.arrow_forward
- In hot, dry climates, plants have evolved mechanisms to avoid photorespiration. Which of the following is FALSE Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b с d C3 plants have no mechanism to avoid photorespiration C4 plants reduce photorespiration by separating the light reaction in the mesophyll cells from the light- independent reaction in the bundle-sheath cells CAM plants minimize photorespiration by collecting and storing CO2 at night and keeping their stomata closed during the day C4 plants include corn, sugarcane, and many grasses CAM plants can undergo photophosphorylation in the absence of sunlight 7 Open in Readinarrow_forwardWhich of the following scenarios happens during the light-dependent reaction of photosynthesis? Oxygen gas is produced in the thylakoid lumen by the oxidation of water by photosystem I. Ferrodoxin and NADP+ reductase participates in the reduction of NADP+ to NADPH. Carbon dioxide enters the plants via stomata. Rubisco attaches three molecules of ribulose bisphosphate (RuBP) to one molecule of carbon dioxide.arrow_forwardi) list TWO adaptations that show that the plant conserves water.ii) Photosynthetic cells produce starch and may be stored. Describe how one may test for the presence of starch on a piece of potato tissue. iii) Give TWO characteristics of monocotyledonous plants. d. The transition of plants from an aquatic environment to a terrestrial one has broughtabout many evolutionary adaptations for plants to survive on land. Give ONE adaptationfor each of the following divisions:i) Mosses: ii) Gymnosperms.arrow_forward
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