Unit 1: Kingdom Plantae Chapters 21-23. Date What are the characteristics of Plants ▪All plants...
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Transcript of Unit 1: Kingdom Plantae Chapters 21-23. Date What are the characteristics of Plants ▪All plants...
![Page 1: Unit 1: Kingdom Plantae Chapters 21-23. Date What are the characteristics of Plants ▪All plants are photosynthetic. ▪All plants are multicellular. ▪All.](https://reader033.fdocuments.in/reader033/viewer/2022051215/56649e9f5503460f94ba1f35/html5/thumbnails/1.jpg)
Unit 1: Kingdom PlantaeChapters 21-23
![Page 2: Unit 1: Kingdom Plantae Chapters 21-23. Date What are the characteristics of Plants ▪All plants are photosynthetic. ▪All plants are multicellular. ▪All.](https://reader033.fdocuments.in/reader033/viewer/2022051215/56649e9f5503460f94ba1f35/html5/thumbnails/2.jpg)
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What are the characteristics of Plants
▪ All plants are photosynthetic. ▪ All plants are multicellular. ▪ All plants are eukaryotic organisms. ▪ All plants can reproduce sexually. ▪ Have cellulose in cell wall▪ Has kinda roots, stems and leaves
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How do plants reproduce
▪ All plants have a sexual life cycle called alternation of generation where the gametophyte and sporophyte generation look different
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What is Alternation of Generation
▪ A haploid(1N) multicellular gametophyte produces gametes that join in fertilization to form a zygote (2N)
▪ Zygote (2N) develops by mitosis into a diploid (2N) sporophyte
▪ Sporophytes then produce haploid spores (1N)▪ When released, these spores (1N) are released and then
develop into (1N) gametophytes
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Where did plants come from
▪ Land plants evolved from green algae of the Division Chlorophyta that lived in ancient oceans or ponds▪ they developed roots, stems and leaves
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Evolution
▪ Earliest known plant from fossil record is of genus Cookonsia
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Radiation offlowering plants
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First seed plants
Early vascular plants
Origin of plants
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![Page 10: Unit 1: Kingdom Plantae Chapters 21-23. Date What are the characteristics of Plants ▪All plants are photosynthetic. ▪All plants are multicellular. ▪All.](https://reader033.fdocuments.in/reader033/viewer/2022051215/56649e9f5503460f94ba1f35/html5/thumbnails/10.jpg)
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What are the 2 types of Terrestrial Plants
(1) Non-vascular plants (e.g., mosses) have no system for transporting water or nutrients.
(2) Vascular plants have a system through which they can transport water and nutrient throughout the plant. This allowed the plants to be taller and live further from water.
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Describe Non Vascular Plants
▪ Division Bryophyta probably arose from a line of plants that had vascular tissue▪ Some have nonfunctioning stomata▪ Don’t grow large because no vessels▪ Need water for gametes to swim
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Provide examples of Division Bryophyta
▪ Class Hepaticae▪ Liverwort
▪ Class Musci▪ Moss
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What are Bryophyte Characteristics
▪ small (non vascular)▪ does not have true roots, stems, leaves (no vessels)▪ “leaves” radiate out from stalk and trap H2O (some
store) ▪ rhizoid (root like structures) absorb water▪ live close to the ground▪ waxy cuticle on outer surface▪ live in moist areas because the sperm have flagella▪ Alternation of Generation (gametophyte is dominant)
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What are Liverworts
▪ flat, hairy rhizoids underneath. ▪ live in shady, moist areas
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What are mosses
▪ short, upright, anchored by rhizoids
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What are the roles and uses of bryophytes
Role▪ habitat for many small creatures▪ rebuilding soil (primary succession)Uses▪ soil conditioners▪ peat moss▪ medicine
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How do Bryophytes reproduce
▪ Nonvascular plants the gametophyte is the larger and more long-lived phase of the sexual life cycle
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