October 23-ch21 - October 23, 2007 Chapter 21 Terrestrial...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
October 23, 2007 Chapter 21 Terrestrial Adaptations Conducting Vessels o Transport water and nutrients throughout plant Lignin o Stiffening agent found in cell walls; supports plat body Reproduction without water Pollen o A reduced male gametophyte that allows wind (instead of water) to carry sperm to eggs Seeds o Nourish, protect, and help disperse developing embryos Flowers o Attract pollinators Fruits o Attract animals to disperse seeds Major groups of plants Bryophytes (nonvascular) o Lack well developed structures for conducting water and nutrients Vascular Plants (tracheophytes) o Complex vascular system The bryophytes Lack true roots, stems, or leaves Have rhizoids, root like anchoring structures Limited body size o Nonvascular o No stiffening agent Most are restricted to moist habitats o Motile sperm must swim to egg Gametophyte generation is dominant Sporophyte remains attached to and is dependant to parental gametophyte Include liverworts, hornworts, and moss Gametes develop within protected structures on gametophytes o May be located on same plant or different plants Fertilization: sperm swim to egg Diploid sporophytes developed within archegonium of gametophyte The Vascular Plants Roots, Stems and Leaves Vessels impregnated with lignin
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sporophyte generation is dominant The Seedless Vascular Plants Gametes develop within archegonia and antheridia
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/10/2008 for the course BIOLOGY 101 taught by Professor Beitch during the Spring '07 term at Quinnipiac.

Page1 / 5

October 23-ch21 - October 23, 2007 Chapter 21 Terrestrial...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online