biological diversity 1. algae 2. archegoniate 3. spermatophyta
Post on 20-Dec-2015
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Biological Diversity
1. Algae
2. Archegoniate
3. Spermatophyta
Characteristics of Algae
1.Eukaryotes 2.Most unicellular, but some multicellular 3.Autotrophic4.Produce oxygen that is returned to the
atmosphere 5.Range in size from microscopic to hundreds of
feet in length 6.Do not have true roots, stems, nor leaves 7.Form gametes (eggs & sperm) 8.Found in freshwater, marine, and moist soil
habitats 9.Most have flagella
PhylumStructure of
ThallusPigments
Food Storage
Cell Wall composition
Chlorophyta(Green Algae)
UnicellularColonial
FilamentousMulticellular
Chlorophyll a & b Carotenoids
StarchMainly Cellulose
Phaeophyta(Brown Algae)
Multicellular
Chlorophyll a & c Carotenoids Fucoxanthin
Peridinin
Laminarin Cellulose
Algin
Rhodophyta(Red Algae)
MulticellularChlorophyll a & d
Phycobilins Carotenoid
StarchCelluloseCaCO3
Bacillariophyta(Diatoms) Unicellular
Some Colonial
Chlorophyll a & c Carotenoids Xanthophyll
Starch PectinSiO2
PhylumStructure of
ThallusPigments
Food Storage
Cell Wall composition
Dinoflagellata(Dinoflagellates)
UnicellularChlorophyll a & c
CarotenoidsStarchCellulose
Chrysophyta(Golden Algae) Unicellular
Some Colonial
Chlorophyll a & cXanthophyll Carotenoids
Laminarin Cellulose
Euglenophyta(Euglenoids)
UnicellularChlorophyll a & b
Carotenoids Xanthophyll
ParamylonNo Cell Wall
Pellicle
Different shapes of algae
Different shapes of algae
Different shapes of algae
Chlorophyta : Chlamydomonas
Life Cycle of Chlamydomonas
Life Cycle of Chlamydomonas
Phaeophyta
Fucus
Rhodophyta
Gelidium
Bacillariophyta (Diatoms)
Centric diatoms : Cyclotella
Pennate diatoms : Navicula
Dinoflagellata:(Dinoflagellates
Chrysophyceae
Mallomonas
Euglenophyta
Euglena
Archegoniate
Archegonium : The female organ
Antheridium : The male organ
Typical alternation of generations life cycle
Typical alternation of generations life cycle
Bryophytes
1.Bryophytes are small, nonvascular plants.
2.Bryophytes lack vascular tissue and have life cycles dominated by the gametophyte phase.
3.Roots are absent in bryophytes, instead there are root-like structures known as rhizoids.
Moss Life cycle
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.
Vascular tissues development
Fern Life cycle
Spermatophyta
The Seed Plants
Alternation of Generations
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.
Development of A Gymnosperm seed
Development of A Gymnosperm seed
Flowering Plant Reproduction
Flower Structure
Seed Structure