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ALGAE

ALGAE. Výukový materiál OR 03 - 65 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: Mgr. Miloslava Dorážková Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR. ALGAE.

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ALGAE

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  1. ALGAE Výukový materiál OR 03 - 65 Tvůrce: Mgr. Alena Výborná Tvůrce anglické verze: Mgr. Miloslava Dorážková Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR

  2. ALGAE • Algae and blue-green algae are the oldest organisms on our planet • Autotrophic • Photosynthesis oxygen into the atmosphere • An eukaryotic type of a cell • The simplest plants • They mainly occur in water (freshwater, seawater), humid soil

  3. ALGAE • They are an important part of food of aquatic animals • Some of them occur even on dry land (humid places) • a green cover on soil or bark • A diverse cell structure and a way of life • They differ in: • Size • Colour • Body structure (a thallus)

  4. ALGAE

  5. GREEN ALGAE • Predecessors of more developed plants • Seawater, freshwater and humid places • Some of them move thanks to flagellas

  6. GREEN ALGAE • Chlorophyceae • Unicellular • Without a flagellum • Chlorophyta • Unicellular • Humid places

  7. GREEN ALGAE • Euglena • Unicellular • Has a flagellum • Mixotrophic (performs photosynthesis + accepts dissolved organic substances from the surroundings) • Volvoxglobator • Unicellular • Has a flagellum • Makes colonies

  8. Volvox globator • A colony of a volvox globator

  9. Euglena • A stigma • Chloroplasts • A nucleus • A flagellum

  10. MULTICELLULAR ALGAE • They are divided into several sections • They differ in: • Thallus structure • Way of reproduction • Way of life

  11. MULTICELLULAR ALGAE • They occur on rock coasts or freely in the sea: • Brown algae • Red algae • Some of them grow into big sizes • Usage : • Feed • Food • Essences from algae are used for treatments

  12. MULTICELLULAR ALGAE • The largest brown algae are: • FUCUS (SEAWEED) • In our country there occur these green fungi: • SPIROGYRA (a spiral chloroplast) • CLADOPHORA

  13. MULTICELLULAR ALGAE– Thalli of sea algae visible just by an eye – red algae and seaweed

  14. REVISION: • 1) Why are algae so important for us? • 2) Where do algae occur? • 3) The largest green algae are called: • 4) Which alga makes colonies?

  15. Source: • DOBRORUKA, Luděk J. Přírodopis pro 7. ročník základní školy. 1. vyd. Praha: Scientia, 1998, 152 s. ISBN 80-718-3134-4

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