2006-06-22 22:20:02 · 3 answers · asked by sol 2 in Education & Reference ➔ Trivia
Plant life that began in the sea gradually evolved into species that could live on land. Some like the mosses remained small but others developed an interior plumbing system and rigid supporting tissues that allowed them to grow much bigger. The woody tissue of trees and capillary tubes for transporting water and sugars makes it possible for trees to reach a great size. Plants that have conducting tubes (tracheae) are known as Tracheophytes and here you see a section through a Tracheophyte stem.
Subphylum Psilopsida
Whisk Ferns
Subphylum Sphenopsida (30+ species)
Horsetails
Subphylum Lycopsida (1061+ species)
Clubmosses, Spikemosses, and Quillworts
Subphylum Pteropsida (810+ species)
Ferns
Subphylum Spermopsida (183494+ species)
Seed Plants
2006-06-22 23:52:38 · answer #1 · answered by Halle 4 · 0⤊ 0⤋
Phylum Tracheophyta
2016-11-01 02:05:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The vascular land plants. Fossil record extends from the Silurian to the Recent. Includes a host of different varieties that are today dominated by the flowering plants.
2006-06-22 22:24:16 · answer #3 · answered by Anonymous · 0⤊ 0⤋