Biology Chapter 29 Objectives

Biology Chapter 29 Objectives - Chapter 29 Plant Diversity...

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

View Full Document Right Arrow Icon
Chapter 29 Plant Diversity I: How Plants Colonized Land An Overview of Land Plant Evolution 1. There are four shared derived homologies that link charophyceans and land plants. 1) Rose-shaped complexes for cellulose synthesis: the cells of both land plants and charophyceans have rosette cellulose-synthesizing complexes. 2) Peroxisome enzymes: the peroxisomes of both land plants and charophyceans contain enzymes that help minimize the loss of organic products as a result of photorespiration. 3) Structure of flagellated sperm: in species of land plants that have flagellated sperm, the structure of the sperm closely resembles that of charophycean sperm. 4) Formation of a phragmoplast: certain details of cell division occur only in land plants and certain charophyceans. 2. The tradition scheme equates the kingdom Plantae with embryophytes, plants with embryos. Some plant biologists now propose that the boundaries of the plant kingdom should be expanded to include the green algae most closely related to plants, and named kingdom Streptophyta. Others suggest an even broader definition of plants that also includes chlorophytes in a kingdom Viridiplantae. 3. There are five characteristics that distinguish land plants from charophycean algae. 1) Apical Meristems: localized regions of cell division at the tips of shoots and roots 2) Alternation of generations: the alternating life cycles of all land plants between two different multicellular bodies, with each form producing the other 3) Walled spores produced in sporangia: the sporophyte has multicellular organs called sporangia that produce plant spores 4) Multicellular gametangia: the production of gametes within multicellular organisms 5) Multicellular, dependent
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 08/29/2009 for the course BIOL 101 taught by Professor Sakji during the Fall '08 term at Linn Tech.

Page1 / 3

Biology Chapter 29 Objectives - Chapter 29 Plant Diversity...

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