Domanda del libro di testo
A barley mutant lacking a gibberellic acid receptor would
a. Fail to make GA.
b. Catalyze starch more quickly.
c. Fail to make α-amylase.
d. Fail to take up water.
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Ch. 39 - Plant Responses to Internal and External Signals
Urry12th EditionCampbell BiologyISBN: 9785794169850
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TOC.tableOfContents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle11
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance6
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology7
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth8
- Ch. 26 - Phylogeny and the Tree of Life8
- Ch. 27 - Bacteria and Archaea6
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants6
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development10
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition11
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System5
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction9
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology9
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Tutti i libri di testo
Urry 12th EditionCh. 39 - Plant Responses to Internal and External SignalsProblema 1
Urry 12th EditionCh. 39 - Plant Responses to Internal and External SignalsProblema 1Capitolo 39, Problema 1
The hormone that helps plants respond to drought is:
a. Auxin
b. Abscisic acid
c. Cytokinin
d. Ethylene
Guida verificata passo dopo passo1
Identify the main function of each hormone listed in the options: auxin, abscisic acid, cytokinin, and ethylene.
Auxin is primarily involved in cell elongation and growth, particularly in the shoots and roots.
Abscisic acid is known for its role in stress responses, particularly in helping plants cope with drought by closing stomata to reduce water loss.
Cytokinin is mainly involved in cell division and growth, influencing the development of shoots and roots.
Ethylene is a hormone associated with fruit ripening and response to stress, but not specifically drought stress.
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Plant Hormones
Plant hormones, or phytohormones, are chemical substances that regulate various functions in plants, including growth, development, and responses to environmental stimuli. They play crucial roles in processes like cell division, flowering, and stress responses. Understanding plant hormones is essential for identifying how plants adapt to changes such as drought conditions.
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Plant Hormones and Senescence
Abscisic Acid
Abscisic acid (ABA) is a plant hormone primarily involved in regulating plant responses to stress, particularly drought. It helps plants conserve water by inducing stomatal closure, reducing water loss through transpiration. ABA also plays a role in seed dormancy and germination, making it a key hormone in plant adaptation to adverse environmental conditions.
Video consigliato:
02:45Acids
Drought Response in Plants
Drought response in plants involves physiological and biochemical changes that help minimize water loss and maintain cellular functions. Key strategies include stomatal closure, root growth alteration, and osmotic adjustment. Hormones like abscisic acid are crucial in signaling these responses, enabling plants to survive periods of water scarcity by conserving resources and maintaining homeostasis.
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06:26Seed Plants - 1
Pratica correlata
Domanda del libro di testo
Charles and Francis Darwin discovered that
a. Auxin is responsible for phototropic curvature
b. Red light is most effective in shoot phototropism
c. Light destroys auxin
d. Light is perceived by the tips of coleoptiles
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Domanda del libro di testo
How may a plant respond to severe heat stress?
a. By reorienting leaves to increase evaporative cooling
b. By creating air tubes for ventilation
c. By producing heat-shock proteins, which may protect the plant's proteins from denaturing
d. By increasing the proportion of unsaturated fatty acids in cell membranes, reducing their fluidity
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