Topic 12 Pg 5456 Kingdom Plantae Land plants some terrestrial some aquatic High diversity with distinguishing characteristics Kingdom Plantae 4 main groups Bryophta mosses liverworts hornworts ID: 579163
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Slide1
BIODIVERSITY OF PLANTS AND REPRODUCTION
Topic 1.2.
Pg. 54-56Slide2
Kingdom Plantae
Land plants – some terrestrial, some aquatic.
High diversity with distinguishing characteristics.Slide3
Kingdom Plantae
4 main groups:
Bryophta
(mosses, liverworts, hornworts)Pteridophyta (ferns)Spermatophyta - Angiosperms (flowering plants) - Gymnosperms (cone-bearing plants)Slide4
Kingdom Plantae
Similarities:
Multicellular
Cell wallsChlorophyllDifferences:
Appearance
Method of obtaining food and water
Other comparative characteristics include:
Vascular tissue - True roots, stems, leaves
Seeds/ spores - Cones/ flowers
Fruit
Dependence on water for reproductionSlide5
Differences between vascular and non-vascular plants
Vascular
Non-vascular
Specialized tissue to conduct/ transport food and water (xylem & phloem)
No specialized conducting/ transport tissue
Have true roots, stems and leaves
No true roots, stems and leaves
(root-like structures = rhizoids)
Divided into seedless and seed-bearing plants
E.g. ferns, cone-bearing and flowering plants
E.g. mosses, liverworts, hornwortsSlide6
All plants have 2 generations:
Gametophyte generation
Sporophyte generation
Generations alternate, giving rise to the other throughout plant life cycle = ALTERNATION OF GENERATIONS Slide7
BRYOPHYTES
3 groups: 1. Mosses
2. Liverworts (flattened; liver-shaped) 3. Hornworts (horn-shaped)Small terrestrial plantsGrow in damp, shady areas
Gametophyte generation = DOMINANT
(large and longer-living than sporophyte generation)Slide8
BRYOPHYTES
CHARACTERISTICS:
No true roots, stems and leaves – thallus plants.
Root-like rhizoids anchor plant in ground.No true vascular tissue.No seeds – reproduce by spores.No fruits – spores in capsules.
Sexual reproduction – depends on
water.
Asexual reproduction – release and dispersal of spores
depends
on dry weather.
Gametophyte generation
= dominant
generationSlide9
BRYOPHYTESSlide10