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22-4 Seed Plants
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Katie Miller Mr. Collins Bilogy period 4
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Recommandé
Plant Diversity lecture covering Mosses, Ferns, Gymnosperms and Angiosperms, based on Chapters 29 and 30 from Campbell & Reece "Biology" 8th edition (International). For ACS Biology 10, Sofia Bulgaria. March 2010
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Gymnosperm is from the Greek “gymnos” naked, and “sperma” seeds. They are groups of vascular plants that reproduce by means of an exposed seeds or ovules. They are phanerogams according to A. W. Eichler.
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Recommandé
Plant Diversity lecture covering Mosses, Ferns, Gymnosperms and Angiosperms, based on Chapters 29 and 30 from Campbell & Reece "Biology" 8th edition (International). For ACS Biology 10, Sofia Bulgaria. March 2010
Plant Diversity Jewett
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MrJewett
Gymnosperms- Coniferophyta (A BOTLEC-160 Presentation by Al-John Ahmad)
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Gymnosperm is from the Greek “gymnos” naked, and “sperma” seeds. They are groups of vascular plants that reproduce by means of an exposed seeds or ovules. They are phanerogams according to A. W. Eichler.
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I give this slide for your learning from the pictures. I put many pictures in the slide. It is easy way to learn from this slide. This slide tells us about the plants and their classification . It is copyright from the textbook of 9th standard. This is biology.
Classification Of Plant
Classification Of Plant
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Giologicale rise and fall of gymnosperm
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I give this slide for your learning from the pictures. I put many pictures in the slide. It is easy way to learn from this slide. This slide tells us about the plants and their classification . It is copyright from the textbook of 9th standard. This is biology.
Classification Of Plant
Classification Of Plant
DakshataPejale
How plants colonized the land
How plants colonized the land and evolution
How plants colonized the land and evolution
Hotaru Imai
Plant divisions gymnosperms and angiosperms
Plant divisions gymnosperms and angiosperms
eziennker
Gymnosperm notes
Gymnosperm notes
Stephanie Kennedy
Ap29 plant diversity1
Ap29 plant diversity1
ktanaka2
Chapter 30
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I am a student of BS (hons) Zoology UCP Pakpattan campus. life Cycle of GYMNOSPERMS.
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(20)
Classification Of Plant
Classification Of Plant
How plants colonized the land and evolution
How plants colonized the land and evolution
Plant divisions gymnosperms and angiosperms
Plant divisions gymnosperms and angiosperms
Gymnosperm notes
Gymnosperm notes
Ap29 plant diversity1
Ap29 plant diversity1
Chapter 30
Chapter 30
Gymnosperms
Gymnosperms
Gnetophyta
Gnetophyta
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Gymnosperms
Introduction to-plants-1233859493415311-3
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Angiosperms
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Giologicale rise and fall of gymnosperm
Giologicale rise and fall of gymnosperm
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Which is a common trait among all land plants? Vascular tissues transport water and nutrients, and provide support Seeds facilitate survival and dispersal of the species Flowers facilitate cross-pollination The embryo is protected within maternal tissues The haploid phase of the life cycle is the dominant phase Flowers facilitate cross-pollination The embryo is protected within maternal tissues The haploid phase of the life cycle is the dominant phase Solution First we see common traits of land plants and then see listed traits in details one by one: 1. Ability to withstand desiccation. Extant land plants have a cuticle and guard cells. 2. Ability to withstand the effects of more intense radiation, particularly DNA-damaging radiation. Extant land plants have several compounds in their vacuoles that absorb UV. Since the vacuole of a plant occupies most of a mature cell, this helps protect the DNA in other organelles. 3. Ability to protect their spores from desiccation. Early land plants have spores that are encased in a sporopollenin wall. Sporopollenin is a very resistant polymer, resistant to UV and almost everything including desiccation, squashing, etc. To remove sporopollenin from spores, one boils them in a mixture of acetic and hydrochloric acid. 4. Ability to move solutions from the ground to portions of the plant that are not in contact with the ground, and from the photosynthetic portions of the plant to non-photosynthetic portions. Some land plants do this better than others. 5. Ability to support themselves. Aquatic plants float; terrestrial plants cannot do so. Most terrestrial plants have lignin in some of their conducting cells. There is some debate as to whether this was selected for by the advantages of growing tall or the need to protect against embolism in the conducting cells. Since both are important, it seems most realistic to accept that both contributed to the success of plants with the ability to manufacture lignin, the tracheophytes or vascular plants. 6. Ability to acquire the carbon dioxide required for photosynthesis from the atmosphere. This ability is associated with stomatal cells, specialized cells that surround openings (stomates) in the outer cell layer of land plants. Now we see Options given one by one: Vascular tissues transport water and nutrients, and provide support Transport of Water and Minerals: The xylem tissue transports water and minerals. It consists of interconnected vessels and tracheids organized into continuous conducting tubes stretching from the roots to the leaves. These tubes carry water and minerals to all parts of the plant. Plants absorb water from the soil through the root and transport it to the stem, leaves and flowers. Roots have root hairs that are unicellular, thin-walled outgrowths of the epiblema (skin of the root). The root hairs are in close contact with the thin film of water surrounding the soil particles. There are mineral salts such as nitrates, chlorides, sulphates, phos.
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Katie Miller Mr.
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