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BIODIVERSITY OF PLANTS AND REPRODUCTION BIODIVERSITY OF PLANTS AND REPRODUCTION

BIODIVERSITY OF PLANTS AND REPRODUCTION - PowerPoint Presentation

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Uploaded On 2017-08-15

BIODIVERSITY OF PLANTS AND REPRODUCTION - PPT Presentation

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

generation plants true vascular plants generation vascular true spores leaves reproduction water tissue roots stems hornworts liverworts mosses bearing

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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