Domanda del libro di testo
In angiosperms, are sperm and eggs produced by mitosis or meiosis?
Which cells are spores?
Which structures are gametophytes?
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Ch. 38 - Flowering Plant Reproduction and Development
Freeman8th EditionBiological ScienceISBN: 9780138276263
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TOC.tableOfContents
- Ch. 1 - Biology: The Study of Life13
- Ch. 2 - Water and Carbon: The Chemical Basis of Life14
- Ch.3 - Protein Structure and Function10
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells11
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation11
- Ch. 10 - Photosynthesis12
- Ch. 11 - Cell-Cell Interactions12
- Ch. 12 - The Cell Cycle8
- Ch. 13 - Meiosis12
- Ch. 14 - Mendel and the Gene23
- Ch. 15 - DNA and the Gene: Synthesis and Repair15
- Ch. 16 - How Genes Work16
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria16
- Ch. 19 - Control of Gene Expression in Eukaryotes12
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers15
- Ch. 21 - Genes, Development, and Evolution12
- Ch. 22 - Evolution by Natural Selection16
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea15
- Ch. 27 - Diversification of Eukaryotes16
- Ch. 28 - Green Algae and Land Plants16
- Ch. 29 - Fungi18
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals15
- Ch. 32 - Deuterostome Animals17
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function17
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development16
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology15
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology17
- Ch. 54 - Biodiversity and Conservation Ecology18
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Freeman 8th EditionCh. 38 - Flowering Plant Reproduction and DevelopmentProblema 1
Freeman 8th EditionCh. 38 - Flowering Plant Reproduction and DevelopmentProblema 1Capitolo 38, Problema 1
Evaluate these statements about double fertilization. Select True or False for each sentence.
T/FTwo zygotes are formed, but only one survives.
T/FOne sperm fuses with an egg while the other sperm fuses with polar nuclei.
T/FIt results in the formation of a diploid embryo and triploid endosperm.
T/FBoth sperm involved in double fertilization form within the same pollen tube.
Guida verificata passo dopo passo1
Understand the concept of double fertilization in angiosperms, which involves two sperm cells. One sperm cell fertilizes the egg cell, forming a diploid zygote, while the other sperm cell fuses with two polar nuclei to form a triploid endosperm.
Evaluate the statement 'Two zygotes are formed, but only one survives.' In double fertilization, only one zygote is formed from the fusion of one sperm with the egg cell. The other sperm cell does not form a zygote but contributes to the formation of the endosperm.
Consider the statement 'One sperm fuses with an egg while the other sperm fuses with polar nuclei.' This accurately describes the process of double fertilization, where one sperm cell fertilizes the egg and the other fuses with the polar nuclei.
Analyze the statement 'It results in the formation of a diploid embryo and triploid endosperm.' This is true, as the fertilization of the egg by one sperm results in a diploid embryo, and the fusion of the other sperm with the polar nuclei results in a triploid endosperm.
Review the statement 'Both sperm involved in double fertilization form within the same pollen tube.' This is true, as both sperm cells are delivered to the ovule through the same pollen tube during the process of fertilization.
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Double Fertilization
Double fertilization is a unique process in flowering plants where two sperm cells from a pollen grain fertilize two different cells within the ovule. One sperm cell fuses with the egg cell to form a diploid zygote, while the other sperm cell fuses with two polar nuclei to form a triploid endosperm, which provides nourishment to the developing embryo.
Video consigliato:
07:44
Double Fertilization
Pollen Tube Formation
The pollen tube is a structure that forms after a pollen grain lands on the stigma of a flower. It grows down the style to reach the ovule, allowing the sperm cells to travel to the egg and polar nuclei. Both sperm cells involved in double fertilization are formed within the same pollen tube, ensuring they reach the ovule simultaneously for fertilization.
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03:08Formation & Breakdown of Polysaccharides
Zygote and Endosperm Formation
In double fertilization, the fusion of one sperm with the egg cell results in the formation of a diploid zygote, which will develop into the embryo. The fusion of the second sperm with the polar nuclei results in the formation of a triploid endosperm, which serves as a food reserve for the growing embryo, supporting its development within the seed.
Video consigliato:
03:08Formation & Breakdown of Polysaccharides
Pratica correlata
Domanda del libro di testo
When does the apical–basal axis first become apparent?
a. When the epidermal, ground, and vascular tissues form
b. When the cotyledons, hypocotyl, and root form
c. When the first cell division produces the apical cell and basal cell
d. During the globular stage, when the suspensor is complete
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Domanda del libro di testo
Which of the following does not occur during embryogenesis?
a. Formation of the radial axis
b. Production of the suspensor
c. Formation of the cotyledons and hypocotyl
d. Formation of the leaf lateral and proximal–distal axes
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