HISTORY OF PLANTS 470 Mill years ago Evidence sheets of moss on rocks and the edge of urine Journey of evolution - to land Earth changed from equatorial - to seasons (hot cold, dry, wet) Further adoption to land -climate Bryophytes         Mosses, Liverwort, etc. ar habituate as examples of plants without most circulating(prenominal) evolutionary adoption But: they ar non the crude(a) ancestors of another(prenominal) plants NOTE: vascular plants came first; non vascular plants came as a branch Characteristic of Bryophytes         Non vascular plant         fool no veins (vascular tissue)         No roots for penetration of the grunge         Are small         overlook support to rent big         Parts mostly enlistment pissed the ground         So they gage get water and nutrients Other characteristics                 No surgery stomata (pores)         They have forgetful control over water loss         fuddle little or no cuticle         Reproduces via spores (not seeds)         Have scourge sperm NOTE: Peat Moss Genus-         Sphagnum-comes from Canada         Agriculture- used as soil additive - retains moisture         Is acidic - prevents seeds wee-wee damping move out (damping hit is a fungus decease) Also used as fuel         Grows very fast         Does not root         level mats many feet thick         Make bricks -burn good         give way than wood         Worse than coal Trends in plant evolution 1.         better vascular tissue a.         xylems=veins in plants         Carries water         Dissolves-nutrients (N, P, K) b.
        most primitive xylem are called tracheids Is made out of curtly cells c.         advanced xylem -(mixture much watercraft elements)         Occurring in seed plants-gymnosperm (no peak seed plants)         Has a vessel element 2.         odds-on branching a.         Earliest vascular plant - no branch b.         thence two branch c.         Then dicatomous branch-equal branching d.         Unequal branching         Get long-shanked faster         more(prenominal) efficiently in sustenance competition 3.         Secondary Growth Growth in diameter (girth) Through adding layers of xylem         They grow taller         Persist cast of characters season to season         succeed from season... If you lack to get a plenteous essay, order it on our website:
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