Section 6 - CHAPTER 29 PLANT DIVERSITY I: HOW PLANTS...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 CHAPTER 29 PLANT DIVERSITY I: HOW PLANTS COLONIZED LAND First Land Plants During the early Paleozoic Era Land Plant Evolution Phylogenetic relationship between Charophycean algae and the land plants. Land Plants Extant (currently living) Charophycean Algae Bryophytes (liverworts, hornworts and mosses) Lycophytes and Pterophytes* (club mosses and ferns), ( seedless ) Gymnosperms* (pines and other conifers) and Angiosperms* (the flowering plants) The Main Groups of Land Plants * vascular plants (See Table 29.1)
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Three clades that are candidates for designation as the Plant Kingdom Fig. 29.4, Text Which of the following is NOT a land plant? A. Ferns B. Pine Trees C. Mosses D. Charophyceans E. Club Mosses F. Liverworts G. Roses Embryophytes The Bryophytes (seedless, nonvascular plants) Mosses Liverworts Hornworts The first land plants! Lycophytes Pterophytes Gymnosperms Angiosperms The Vascular Plants
Background image of page 2
3 Ferns, club mosses (not really a moss), horsetails, whisk ferns Lycophytes and Pterophytes The rest of the land plants evolved Seeds Ginkos, cycads, gnetae, and conifers Gymnosperms (earliest seed plants) The great majority of modern-day flowering plants. Angiosperms
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Land plants share four key features with their closet relatives, the charophycean algae (protists): 1. Rosette cellulose- synthesizing complexes 2. Enzymes produced by peroxisomes 3. Specialized structure of flagellated sperm 4. Formation of a phragmoplast (cell plate from Golgi-derived vesicles and cytoskeletal elements) Charophyceans Rosette cellulose-synthesizing complexes Unique enzymes of the peroxisomes 1.What are peroxisomes? 2.What is their function? In those land plants that have flagellated sperm cells, the structure of the sperm resembles the sperm of charophyceans . Finally, certain details of cell division are common only to land plants and the most complex charophycean algae Two other additonal homologies: Phragmoplast 1. Apical meristems 2. Multicellular embryos dependent on the parent plant 3. Alternation of generations 4. Sporangia that produce walled spores 5. Multicellular gametangia that produce gametes So, what’s the difference between charophycean algae and land plants? Several Terrestrial adaptations Land plants have:
Background image of page 4
5 Plants show varying degrees of structural specialization in their subterranean and aerial organs - roots and shoots in most plants. Shoot tip
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/02/2008 for the course GEOG 202 taught by Professor O'reilly during the Fall '07 term at Texas A&M.

Page1 / 19

Section 6 - CHAPTER 29 PLANT DIVERSITY I: HOW PLANTS...

This preview shows document pages 1 - 6. Sign up to view the full document.

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