Ch 17 plants colonization of land
Download
1 / 19

Ch 17 Plants Colonization of Land - PowerPoint PPT Presentation


  • 190 Views
  • Uploaded on

Ch 17 Plants Colonization of Land. LM 444 . PLANT EVOLUTION AND DIVERSITY. Plants evolved from green algae Molecular, physical, and chemical evidence Indicates that green algae called charophyceans are the closest living relatives of plants. Figure 17.1A, B. Coleochate. Chara.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Ch 17 Plants Colonization of Land' - presta


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Plant evolution and diversity

LM 444

PLANT EVOLUTION AND DIVERSITY

  • Plants evolved from green algae

    • Molecular, physical, and chemical evidence

      • Indicates that green algae called charophyceans are the closest living relatives of plants

Figure 17.1A, B

Coleochate

Chara



Plant

Reproductive structures, as in flowers,contain spores and gametes

Leaf performs photosynthesis

Cuticle covering leaves and stemsreduces water loss; stomata inleaves allow gas exchange

Stem supports plant and mayperform photosynthesis

Surrounding watersupports alga

Alga

Whole algaperformsphotosynthesis;absorbs water,CO2, andminerals fromthe water

Rootsanchor plant;absorb water andminerals fromthe soil

Holdfastanchors alga

  • Plants have some specific adaptations

    • That are not found in algae

Figure 17.2A



  • Maintaining Moisture

    • A waxy cuticle covers the stems and leaves of plants

      • And helps retain water

    • Stomata

      • Are tiny pores in leaves that allow for gas exchange


Figure 17.2B

Xylem Phloem


  • Reproducing on Land

    • Many living plants

      • Produce gametes that are encased in protective structures

“Gametangia”


Land plants

Vascular plants

Bryophytes(nonvascular plants)

Seed plants

Seedless vascular plants

Mosses

Hornworts

Liverworts

Angiosperms

Gymnosperms

Pterophytes(ferns and relatives)

Lycophytes(club mosses and relatives)

Origin of seed plants(about 360 mya)

Origin of vascular plants(about 420 mya)

Origin of land plants(about 475 mya)

  • Plant diversity reflects the evolutionary history of the plant kingdom

    • Some highlights of plant evolution

Figure 17.3A


Figure 17.3B


Figure 17.3C


Figure 17.7



  • Seed plants

    • Have pollen grains that transport sperm

    • Protect their embryos in seeds


Figure 17.3D


Figure 17.3E


Figure 17.11A–C


Kopi luwak 100 llb
Kopi Luwak dispersal$100/llb


ad