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Biological Diversity Algae Archegoniate Spermatophyta.

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Presentation on theme: "Biological Diversity Algae Archegoniate Spermatophyta."— Presentation transcript:

1 Biological Diversity Algae Archegoniate Spermatophyta

2 Characteristics of Algae
Eukaryotes Most unicellular, but some multicellular Autotrophic Produce oxygen that is returned to the atmosphere Range in size from microscopic to hundreds of feet in length Do not have true roots, stems, nor leaves Form gametes (eggs & sperm) Found in freshwater, marine, and moist soil habitats Most have flagella

3 Chlorophyll a & b Carotenoids
Cell Wall composition Food Storage  Pigments Structure of Thallus Phylum Mainly Cellulose Starch Chlorophyll a & b Carotenoids Unicellular Colonial Filamentous Multicellular   Chlorophyta (Green Algae) Cellulose Algin Laminarin  Chlorophyll a & c Carotenoids Fucoxanthin Peridinin Multicellular Phaeophyta (Brown Algae) Cellulose CaCO3 Chlorophyll a & d Phycobilins Carotenoid Rhodophyta (Red Algae) Pectin SiO2 Starch  Chlorophyll a & c Carotenoids Xanthophyll  Unicellular Some Colonial Bacillariophyta (Diatoms)

4 Chlorophyll a & c Carotenoids Unicellular
Cell Wall composition Food Storage  Pigments Structure of Thallus Phylum Cellulose Starch Chlorophyll a & c Carotenoids Unicellular Dinoflagellata (Dinoflagellates) Laminarin Chlorophyll a & c Xanthophyll Carotenoids  Unicellular Some Colonial Chrysophyta (Golden Algae) No Cell Wall  Pellicle Paramylon Chlorophyll a & b Carotenoids Xanthophyll Euglenophyta (Euglenoids)

5 Different shapes of algae

6 Different shapes of algae

7 Different shapes of algae

8 Chlorophyta : Chlamydomonas

9 Life Cycle of Chlamydomonas

10 Phaeophyta Fucus

11 Rhodophyta Gelidium

12 Bacillariophyta (Diatoms)
Centric diatoms : Cyclotella Pennate diatoms : Navicula

13 Dinoflagellata:(Dinoflagellates

14 Chrysophyceae Mallomonas

15 Euglenophyta Euglena

16 Archegoniate

17 Archegonium : The female organ

18 Antheridium : The male organ


20 Typical alternation of generations life cycle

21 Typical alternation of generations life cycle

22 Bryophytes Bryophytes are small, nonvascular plants. Bryophytes lack vascular tissue and have life cycles dominated by the gametophyte phase. Roots are absent in bryophytes, instead there are root-like structures known as rhizoids.

23 Moss Life cycle

24 Pteridophytes Pteridophytes are vascular plants have specialized transporting cells xylem (for transporting water and mineral nutrients) and phloem (for transporting sugars from leaves to the rest of the plant). Pteridophytes are larger and more complex than bryophytes, and have a life cycle where the sporophyte is more prominent than the gametophyte.

25 Vascular tissues development

26 Fern Life cycle

27 Spermatophyta The Seed Plants

28 Alternation of Generations

29 Seed producing plants can be divided into two groups
Gymnosperms - produce seeds but the seeds are not contained inside any structure. These plants have cones. Angiosperms - the seeds are produced inside and “ovary” which becomes the fruit. These plants have flowers.

30 Development of A Gymnosperm seed

31 Development of A Gymnosperm seed


33 Flowering Plant Reproduction
Flower Structure

34 Seed Structure

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