biology

All green algae and the land plants shared a common ancestor a little over

• 1 B Y A

• 2 BYA

• 5 BYA

• 10 BYA

Origin of Land Plants

• known as a green plant, Supported by DNA sequence data,

  some are photoautotrophs,

• The origin is red plants

• brown algae

Plant Issues on land

• Water Loss, protected from harmful effects of the sun, ability to effectively disseminate gametes for production

• Plants are being destroyed

• Plants are getting too much sun light

Conization of the Land

• Fungi helped plants to colonize land & make nutrients for plants

• fungi destroys plants

• Green plants colonize land

Green Algae Two major clades

• Chlorophytes- Never made it to land

  Charophytes- Sister clade to all land plants

• streptophytes

• gameophytes

Streptophytes

• Charotypes and land plants

• gameophytes

Land Plants

• Goes through 3 phases of multicellular, haploid and diploid

  Diploid embryo protection

  reduction of haploid stage

• Goes Through one stage of multicellular.

Chlorophytes and Charophytes

• green algae and green plants

• land plants

Bryophytes

• Land plants, liverworts, mosses, hornworts

• gymnosperms

• Angiosperm

Land plants

• Bryophytes, tracheophytes, Euphyllophytes, seed plants

• angiosperms

• Gymnosperm