'Male cones' diaporamas de présentation

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

Common Trees of the Gulf Islands: Identification and Knowledge. What are the six most common tree species on Mayne Island?. Douglas fir Western red cedar grand fir Arbutus red alder Big leaf maple. Which three species are conifer trees?. Douglas fir. Conifer Cones not flowers

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Gymonosperms mean naked seed. Seeds produced by gymnosperms like this Giant Sequoia. Most gymnosperms are trees, some are shrubs,most have needlelike or scalelike leaves. Gymnosperms are the oldest type of land plant. Cycads are about 175 million years old.

Lab 11: Cordaitales, Coniferales, Gnetales. phylogeny. Cordaitales (extinct). Conifers (extant). Leaves. Vascular Bundle. Endodermis. Resin Canal. Sunken Stomata. Wood. Picnoxylic. Root. Male Cones. microsporophyll. “wings”. sulcus. 1. Female Cones. Megasporocyte.

GYMNOSPERMS. INTRODUCTION. Gymnosperms ( Gymno : naked, sperma = seed ) include simpler and primitive plants. They are characterised by the presence of naked ovules , borne unprotected on the surface of the megasporophylls .

GYMNOSPERMS. “Naked Seeds”. General Characteristics. Vascular Alternation of generations Dominant sporophyte Reduced, dependent gametophyte Produce uncovered seeds. 4 Phyla of Gymnosperms. Cycads Gingko Conifers Gnetophytes. Cycads. Most diverse during age of dinosaurs

Classifying Plants. What makes a plant?. Plants are unique because they make their own food by photosynthesis. Photosynthesis is a process of taking energy from the sun and using it to create sugars (food) that they use to grow.

Parts of a Seed Plant. Objectives: Explain the lifecycle of a gymnosperm and an angiosperm. Gymnosperms. A gymnosperm is a seed plant that produces “naked” seeds (This means seeds are not enclosed in a fruit).

Angiosperms vs. Gymnosperms. Part 2. Gymnosperms. Bear seeds directly on cones Male cones and female cones Rely on the wind to blow the seeds around Most pollen in the air is pollen from a gymnosperm Pine tree pollen is green Pollen is plant sperm. Examples of Gymnosperms.

Plant Overview and Reproduction. Pre-AP Biology Mrs. Scott. What Is a Plant?. Members of the kingdom Plantae Plants are multicellular eukaryotes Plants have cell walls made of cellulose .

Gymnosperms. Gymnosperms. Gymnosperms are plants that produce naked seeds – or seeds that are not covered by a protective fruit. Gymnosperms. Every gymnosperm produces naked seeds (they are not surrounded by a protective fruit)

“Gymnosperms”. Judd et al pp. 206-221. Gymnosperms. Cycads Gingkos (one left-- Gingko biloba ) Conifers Gnetales At least two extinct lineages that were polyphyletic with regards to currently extant gymnosperms. Cycads.

Plants!!!. 7 th Grade Science. What is a plant?. Autotrophs Photosynthesis Use energy from the sun to make their food Eukaryotes Many cells organized into tissues Tissues = groups of similar cells that performs a specific function Plant Cells

Gymnosperms. Biology 11. KINGDOM PLANTAE. Vascular Plants Phylum Tracheophyta. Seeds. No Seeds. Seeds enclosed. Seeds ‘naked’. Ferns. Phylum Cycadophyta (cycads) Ginkgophyta (ginkgo) Gnetophyta (shrubs, vines, tuberous root)

2 kinds of cones. Conifers. Male vs. Female Cones. Male Pollen cones. Female Seed cones immature. Male. Female immature. Mature Immature. “ Naked” and “Covered”. Reproduction. Scales Male cones produce male gametophytes called pollen grain

Cycadophyta. By: Varsha Bhatnagar, Amy Hodgson, and Nicole Nicholas. Appearance : BEAUTIFUL!!. Facts:. Extremely ancient (280 million years ago), coexisted with dinosaurs Seed Plant Characterized by a large crown of compound leaves and a stout trunk

Gymnosperms. A seed plant that produces “naked” seeds. What are gymnosperms?. Seed plants that produce seeds NOT enclosed in a protective fruit. Many have needle-like leaves Deep growing root systems Oldest type of seed plant-giant sequoias. 4 groups of gymnosperms. Cycads Conifers

Chapter 22: Plants with Seeds. Section 1: Seed Plants – The Spermopsida. Seed Plants – The Spermopsida. Life on land offers several benefits to plants Abundant sunlight Continuous free movement of gaseous carbon dioxide and oxygen Life on land also presents significant problems

Plant Organs and Tissues. Mr. Ramos. Introduction to Plants. There are over 260,000 different species of flowering plants alone! Plants are multicellular, eukaryotic organisms . Photosynthetic Plants have a cell wall made of cellulose . Plants take up water via capillary action. .