Plants
Plants
Evolutionary Past Cyanobacteria
Blue- green algae Photosynthetic Responsible for the
marked increase in Oxygen 2000 million years ago
Cyanobacteria Evidence DNA shows the first
green plants evolved from prokaryotes between 2500 and 1000 million years ago.
Same chlorophyll in algae and land plants.
Endosymbiosis a symbiotic
relationship between two organisms in which one of the two organisms (the endosymbiont) lives inside the body of the other one (the host).
Classification of Plants Kingdom - Plantae Division (-phyta) Class (-opsida) Subclass (-idae) Order (-ales) Family (-aceae) Genus Species (Genus + specific epithet)
Magnolia grandiflora
Plantae--includes all plants Magnoliophyta--flowering plants Magnoliopsida--dicots Magnoliidae--subclass for Magnolia-like
plants Magnoliales--order for Magnolia-like plants Magnoliaceae--family for Magnolia-like
plants Magnolia--genus that includes all Magnolias grandiflora--specific epithet
Circumscription of Features A new condition is added at each step to
set up a category that is MOST specific.Example: Things with wheels = buses, cars,
bicycles, skates, airplanes, trains, etc. And is ground transport = buses, cars,
bicycles, trains And can carry more than one person =
buses, cars, trains And runs on rails = trains
http://www.csdl.tamu.edu/FLORA/tfplab/lab1a.htm#taxonomy
Four major lineages Nonvascular
– lack xylem & phloem & seeds Seedless vascular
– have xylem & phloem, lack seeds Gymnosperms
- have seeds, but not enclosed Angiosperms
- enclosed seeds
Examples
Nonvascular lifecycle
Seedless vascular lifecycle
Gymnosperm lifecycle
Angiosperm lifecycle
Classes of Angiosperms Monocotyledonae (Monocots)
Very few are annuals Lilies, grasses, cattails, palms, yuccas,
orchids, irises Dicotyledonae (Dicots)
More primative, 1/6 are annuals Almost all kinds of trees and shrubs Snapdragons, mints, peas, sunflowers
Monocot characteristics
Dicot characteristics
Parts of the flower
PISTIL Stigma Style OvarySTAMEN Anther Filament
Reproductive Organs
Close up of stigma, style and anthers in a tulip
Works Cited –retrieved 5/16/06
http://www.personal.psu.edu http://www.biology.iastate.edu http://www.emc.maricopa.edu http://fybio.bio.usyd.edu.au http://scitec.uwichill.edu http://images.google.com/images http://www.cas.vanderbilt.edu
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