Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 30, Problem 7SQ
Summary Introduction
Concept introduction: The biological clock or circadian clock in the plant body is meant for setting the daily cycle of day and night signals at dawn and dusk. Phytochromes and cryptochromes are the two photoreceptors that are used by plants for gathering information about the light environment for setting the clock.
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Chapter 30 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 30 - Prob. 1SQCh. 30 - _______ is the hormone in most rooting compounds....Ch. 30 - Which of the following statements is false? a....Ch. 30 - Prob. 4SQCh. 30 - Ethylene differs from other hormones in that it...Ch. 30 - Heliotropism may be related to ________ a. photo...Ch. 30 - Prob. 7SQCh. 30 - Prob. 8SQCh. 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 - Volatile Secondary Metabolites in Plant Stress...Ch. 30 - Stomata dose in response to ________ a. ABA b....Ch. 30 - Prob. 10SQCh. 30 - Match the hormonewith the characteristic. _____...Ch. 30 - Match the hormone with the observation. ____...Ch. 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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- Herbicides that act by promoting photorespiration are lethalto C3 plants but do not affect C4 plants. Why is this so?arrow_forwardHoware C4 plants and CAM (crassulacean acid metabolism) plants similar?a.They both open their stomata at night.b.They both initially fix carbon into a four carbon molecule.c.They both use more water to fix carbon into an organic compound than C3plants.d.They both have bundle sheath cells.e.Both carbon fixation and PGA production occurs in mesophyll cells.arrow_forward1. A short-day plant flowers only when exposed to light for less than 12 hours long. Which of the following would cause the plant to flower a 12-hour day and 12-hour night with a flash of red light b. an 8-hour day and 16-hour night with a flash of white light after 8 hours c. 9-hour night and 15-hour day with 1 minute of darkness after 7 hours d. 13-hour night and 11-hour day with 1 minute of darkness after 6 hours e. 24 hours of continuous lightarrow_forward
- In plants, fibers are a type of______ cell. a. parenchyma c. collenchyma b. sclerenchyma d. mesophyllarrow_forwardPhytochrome is a plant pigment protein that: a. mediates plant infection b. promotes plant growth c. mediates morphological changes in response to red and far-red light d. inhibits plant growtharrow_forwardWhich of the following statements is/are FALSE for CAM plants? a.The dark reaction uses less ATP and NADPH than other plants. b.Succulents and tropical plants growing under semi-arid condition. c.C4 pathway occurs at night and C3 pathway occurs at daytime. d.Scotoactive stomata are open during daytime but close at nighttime.arrow_forward
- Which of the following descriptions about C4 and CAM plants is not correct? Select one: a. CAM plants use CO2 released from organic compounds during the day b. C4 and CAM plants both close stomata during the day in hot and dry climates. c. in C4 plants, PEP carboxylase present in bundle-sheath cells incorporate CO2 into C4 compounds d. CAM plants fix CO2 at night e. C4 plants use PEP carboxylase to fix CO2 even when CO2 concentrations are lowarrow_forwardIn 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 e 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 Open in Readirarrow_forwardIn 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_forward
- Pfr, the active state of _______________, forms when red light is absorbed. (a) photosystem I (b) phytochrome (c) far-red light (d) phototropin (e) cryptochromearrow_forwardClosed stomata ________. a. limit gas exchange c. prevent photosynthesis b. permit water loss d. absorb lightarrow_forwardYou hear the familiar jingle "most have cones for seeds, most have needles for leaves" and you automatically think.. O A This song is about the most common group of gymnosperms, the ginkgos! B Ephedra is the plant mentioned in this catchy tune. C That song was written by someone who hasn't taken BIO 200! It SHOULD go "most have cones for leaves, most have needles for seeds". D I'm thinking of that song because stores already have Christmas trees out even though it's not even Thanksgiving! E Cycads are really cool!arrow_forward
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