Chapter 29

Chapter 29 - C hapter 29 Plant D iversity I How Plants...

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Chapter 29 : Plant Diversity I: How Plants Colonized Land CQ – The ancestors of terrestrial plants are considered to be ____? Charophyceans Concept 29.1: Land plants evolved from green algae Charophyceans have been identified as the closest relatives of land plants - Figure 29.3 Four Key traits land plants share with Charophyceans - Rose-shaped complexes for cellulose synthesis - Peroxisome (organelles within the cell ) enzymes - Structure of flagellated sperm - Formation of phragmatoplasts – structure that form that cells are dividing Genetic evidence - Comparisons of nuclear and chloroplast genes point to close relationship between charophytes and land plants The Move to land - Durable polymer sporopollenin found in charophyceans & land plants --- prevents spores from drying out - Great opportunity for adaptive radiation --- Sunlight unfiltered b y water and plankton – get direct unlight --- Abundance of CO2 --- Nutrient-rich soil – nutrient are limited in water ---Few herbivores and pathogens
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Chapter 29 - C hapter 29 Plant D iversity I How Plants...

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