<LCPO> BIOLOGY
12th Edition
ISBN: 9781266216398
Author: Raven
Publisher: MCG CUSTOM
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Chapter 39, Problem 2U
Summary Introduction
Introduction:
The plants are divided into two regional parts based upon the appearance of the eyes of the humans. The upper part of the plant is called shoot and the lower part of the plant is called root.
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Students have asked these similar questions
Which of the following statements about phototropism is/are not true?
A. Red light is the most effective light wavelength for positive phototropism of plants.
B. Higher auxin concentration on the lighted side causes that side to elongate more than the non illuminated side.
C. Phototropins are the only effective light receptors in phototropism.
D. Phototropism decreases the plant's ability to enhance photosynthetic capacity.
E. All of the above
F. None of the above
Watch the suggested videos for Plants Response to Stimuli. a. GeotropismGeotropism Experiment (2:48 minutes)https://www.youtube.com/watch?v=AEo5UsPeB5gb. PhototropismPhototropism Experiment (2:16 minutes)https://www.youtube.com/watch?v=WZ1NRP3OF5w
a. For each experimental set up (geotropism and phototropism), identify the dependent and independent variables that have contributed to how plants responded to the stimuli.
Discuss other morphological differences between sunny and shady set-ups of mung bean in relation to phototropic response of plants.
Characteristics
sunny
shaded
Leaf color
Lime Green
Pale Green
Direction of Growth
Grows upward towards the direction of sunlight
Oriented in the direction of the light but growth is bent downward
Chapter 39 Solutions
<LCPO> BIOLOGY
Ch. 39.1 - Compare the pigments phytochrome and chlorophyll.Ch. 39.1 - List growth responses influenced by phytochrome.Ch. 39.1 - Prob. 3LOCh. 39.2 - Prob. 1LOCh. 39.2 - Prob. 2LOCh. 39.3 - Prob. 1LOCh. 39.3 - Prob. 2LOCh. 39.3 - Prob. 3LOCh. 39.4 - Prob. 1LOCh. 39.4 - Prob. 2LO
Ch. 39.4 - Identify the types of biological molecules that...Ch. 39.5 - Discuss properties of hormones.Ch. 39.5 - Prob. 2LOCh. 39.5 - Prob. 3LOCh. 39 - Prob. 1DACh. 39 - Prob. 1IQCh. 39 - Prob. 2IQCh. 39 - Propose a mechanism to explain how seedlings could...Ch. 39 - Which of the following is stimulated by blue...Ch. 39 - Prob. 2UCh. 39 - Prob. 3UCh. 39 - Prob. 4UCh. 39 - Which of the following does NOT happen as a seed...Ch. 39 - Dwarf mutants can sometimes be induced to grow...Ch. 39 - Prob. 1ACh. 39 - If you were to plant a de-etiolated (det2) mutant...Ch. 39 - Prob. 3ACh. 39 - Which of the following defects would prevent...Ch. 39 - You have come up with a brilliant idea to stretch...Ch. 39 - You have identified a mutant Arabtdopsis plant...Ch. 39 - Which of the following might not be observed in a...Ch. 39 - Prob. 1SCh. 39 - Prob. 2SCh. 39 - The current model for gravitropism suggests that...Ch. 39 - Prob. 4S
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- Thigmotropism is a plant response toa. light. b. cold.c. touch. d. gravity. e. drought.arrow_forwardStomatal opening is induced by… Select one: a. high CO2 levels in the leaf. b. abscisic acid produced by mesophyll cells. c. proton pumps activated by green light. d. an increase in the water potential (becomes more positive) of guard cells. e. active transport of H+ ions out of the guard cell.arrow_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_forward
- UntouhedLeaves Describe what happened to the Mimosa leaf when touched. The picture on top shows a screenshot of the reaction of the plant leaf to touch presenting rapid response or nastic movement. Choose the correct statement that describes your result.. a. The leaf would rapidly move to clump together. b. Leaves moves as if it is being moved by wind. c. The plant dies since its hyper sensitive to touch. d. Leaf would bend to look it has been wiltedarrow_forwardWhich of the following plants requires light hours above than critical photoperiod for flowering? a.Henbane b.Tobacco c.Pepper d.Cucurbitarrow_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
- 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_forwardPhytochromea. can be affected by red and far-red wavelengths of light.b. affects a plant’s photoperiod.c. helps plants sense proximity to neighboring plants.d. All of these are correct.arrow_forward
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