'Male gametophyte' diaporamas de présentation

Chapter 29

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Division: Cycadophyta

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Chapter 29 - Sadava The Evolution of Seed Plants

29. Chapter 29 - Sadava The Evolution of Seed Plants. Late in Devonian, some plants developed secondary growth Thickened woody stems of xylem The first species with secondary growth were progymnosperms ? seedless vascular plants, now extinct.

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Lecture #5

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Plant Reproduction

Plant Reproduction. Creating the next generation. W O R K T O G E T H E R. Is a seed alive? Is a fruit alive? Answer as completely as you can on your own paper. (Hang on to your paper until the end of class.). Asexual Reproduction.

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Chapter 29

Chapter 29. Plant Diversity I: How Plants Colonized Land. Overview: The Greening of Earth. Since colonizing land at least 475 million years ago, plants have diversified into roughly 290,000 living species. Plants supply oxygen and are the ultimate source of most food eaten by land animals.

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Seedless Plants

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Flowers and seeds

Flowers and seeds. The plant kingdom ~ 275,000 flowering plants! Focus on angiosperms Brief foray into gymnosperms and ferns Apologies to the rest of the kingdom for lack of coverage. Tegeder and Ward, 2012. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3355764/.

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KINGDOM PLANTAE

KINGDOM PLANTAE. Chapters 29 & 30. Kingdom: PLANTAE. Characteristics. Multicellular Mostly photosynthetic, contain chlorophyll and other pigments - some parasitic or carnivorous Cell walls made of cellulose Food stored as starch

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Evolution of Cycads, Gymnosperms and Ferns

Evolution of Cycads, Gymnosperms and Ferns . Gymnosperm anatomy - secondary xylem tracheids , circular bordered pits - and fern-like fronds & reproductive dispersal by spores . (no seeds) Arose in Upper Devonian 350 mya --> Pennsylvanian 290 mya All extinct

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Evolution of Cycads, Gymnosperms and Ferns

Evolution of Cycads, Gymnosperms and Ferns . Gymnosperm anatomy - secondary xylem tracheids , circular bordered pits - and fern-like fronds & reproductive dispersal by spores . (no seeds) Arose in Upper Devonian 350 mya --> Pennsylvanian 290 mya All extinct

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Pollen and egg development

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Introduction to Plants

Introduction to Plants. Mrs. M. Rightler. Earliest Plants. Algae Phytoplankton Lived in the sea. Problem Drying Out Making Food Reproduction Gravity & Support Getting water & nutrients. Solution Waxy cuticle, stomata Formed leaves Develops spores & seeds Bark (cork) & vessels

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Introduction to Plants

Introduction to Plants. Mrs. M. Rightler. Earliest Plants. Algae Phytoplankton Lived in the sea. Problem Drying Out Making Food Reproduction Gravity & Support Getting water & nutrients. Solution Waxy cuticle, stomata Formed leaves Develops spores & seeds Bark (cork) & vessels

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Conifers

Conifers. BIOL 1407. Seed Plants. Vascular Tissue Produce seeds Dispersal of offspring Produce pollen Sperm transfer without water. Seed Plants. Sporophyte dominant Gametophytes Greatly reduced in size Dependent on sporophyte. Seed Plants. Heterosporous Megaspore

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CYCAS Structure, Reproduction & Life-Cycle

CYCAS Structure, Reproduction & Life-Cycle. Dr. Maninder Kaur Associate Professor Botany Post Graduate Government College for Girls Sector-11, Chandigarh. Systematic Position. Gymnospermae Division: CYCADOPHYTA Class: CYCADOPSIDA Order: CYCADALES Family: CYCADACEAE Genus: CYCAS

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Male Gametophyte

Female Gametophyte. Male Gametophyte. Ovary and 5 stigma lobes of Sagina nodosa (Knotted Pearlwort, Caryophyllaceae). Note stigmatic papillae. Onagraceae Oenothera fruticosa. Malvaceae Sildalcea malviflora. Liliaceae Lilium auratum. Euphorbiaceae Ricinus communis.

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Chapter 29

Chapter 29. Plant Diversity I How Plants Colonized Land. Plants are classified in 4 main divisions (aka phyla) according to whether or not they contain vascular tissue and whether or not they produce seeds, flowers , & fruits. Concept 29.1: Land plants evolved from green algae.

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MONOCOT AND DICOT IDENTIFICATION

MONOCOT AND DICOT IDENTIFICATION. Dicot. Monocot. Dicot. Dicot. Monocot. Dicot. Monocot. Dicot. Monocot. Dicot. Monocot. Dicot. Dicot. Gymnosperm. See How Well You Know It?. 1. The function of xylem tissue is to? ________

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Chapter 8 Section 4

Chapter 8 Section 4. Gymnosperms. Gymnosperms. A seed plant that produces naked seeds Not enclosed by a protective fruit Many gymnosperms have needle-like or scale-like leaves, and deep-growing root systems Oldest type of seed plant. Cycads. Grow mainly in tropical and subtropical areas

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