topic5-1 - BIOL 1030 TOPIC 5 LECTURE NOTES Topic 5:...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
BIOL 1030 – TOPIC 5 LECTURE NOTES Topic 5: Seedless Vascular Plants (Ch. 29) I. Vascular Plants (overview) – plants with xylem and phloem – 7 to 9 living phyla, depending on who you talk to A. able to dominate most terrestrial habitats because of vascular tissues, waxy cuticle, and stomata B. conducting tissues (xylem and phloem) called vascular tissues 1. cylindrical or elongated cells that form network throughout plant 2. xylem conducts water and dissolved minerals upward typically dead cells typically at least partially lignified (having lignin , a highly branched polymer that makes cell wall more rigid) 3. phloem transports carbohydrates in solution throughout plant (down and up) living cells 4. only with vascular tissue do you have true leaves, stems, and roots C. sporophyte dominant D. vascular tissue is usually only found in the sporophyte generation E. seeds (when present) are highly resistant structures that increase ability of developing embryos to survive on land F. divided into seedless and seed-forming groups; seed-forming phyla covered in future outlines II. Seedless Vascular Plants (ferns and fern allies) A. sporophyte dominant and can grow independent of gametophyte in all B. gametophyte small, reduced, but still able to grow independent of sporophyte in all C. importance: dominated land during Carboniferous Period (354-290 million years ago), becoming a source of coal 1. coal is incompletely decomposed, highly compressed, carbon-rich rock derived mainly from the bodies of ancient seedless vascular plants (a type of “ fossil fuel ”) 2. fossil coal swamps are full of extinct plants 3. coal is a vital source of energy; burned for heat and for producing electricity (over half of U.S. electric production)
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course BIOL 1030 taught by Professor Folkerts during the Spring '07 term at Auburn University.

Page1 / 3

topic5-1 - BIOL 1030 TOPIC 5 LECTURE NOTES Topic 5:...

This preview shows document pages 1 - 2. Sign up to view the full document.

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