3. Pteridophytes Removal of heavy metals (arsenic), treatment of many diseases. Vascular plants with xylem and phloem Reproduce via spores Leaves are called fronds Have rhizoids They divide in twogroups: theFerns and Lycopodiophyta Interactwithearthworms in anindirectway. Ithelps in thesoilfortheorganism.
4. Gymnosperms Lumber, soap, varnish, paints, perfumes Seed plants Vascular plants Reproductive structures They were dominant plants in the Jurassic period. The surviving Gymnosperms are similar in their woody habit and pattern of seed development but are not closely related. They have contributed to many of the evolutionary adaptations found in the biological world.
5. Angiosperms Source of food, they can be medicinal, its wood is used for furniture and it can provide shelter to animals. Vascular plants Produce structures cones Seed plants Reduced male parts, three cells Endosperm formation moth, bee, wasp, or beetle. It helps those organisms to get the necessary nutrition that they need.
7. PhylogeneticTreeDescription Thephylogenetictree shows therelation and history of evolution of thefourmaingroups of plantsthat are: bryophytes, gymnosperms, angiosperms and pteridophytes –orferns. Thefirstplantthatexistedwasthebryophyte, being a non-vascular plant. Then, thepteridophytescamealsowiththesamecharacteristic; thenfollowedbythegymnospermwiththe new characteristic of producingseeds and forlastbutnotleast, theangiospermthat produces flower and/orfruit.
![Quotes "All that is necessary for evil to triumph is for good men to do nothing." — Edmund Burke ,[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)