POLI 1001 Chapter : Page 4
Document Summary
Plant diversity i: how plants colonized land 1/14/2015 5:14:00 pm. Concept 29. 1: land plants evolved from green algae (figure 29. 3: charophyceans have been identified as the closest relatives of land plants. 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 by water and plankton, abundance of co2, nutrient-rich soil, few herbivores & pathogens. Four key traits in nearly all land plants. Question: in the diagram, which box represents reduction division from a diploid state to a haploid state, box a, box b, box c, a & b. Concept 29. 2: mosses and other nonvascular plants have life cycles. Dominated by gametophytes: bryophytes are represented today by three phyla of small herbaceous (non-woody) plants, liverworts, hornworts, mosses.
