[BIOL 225] - Final Exam Guide - Ultimate 886 pages long Study Guide!
29 Nov 2016
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Mosses and other nonvascular plants have life cycles dominated by gametophytes. Ferns and other seedless vascular plants were the first plants to grow tall. For more than first 3 billion years of earth"s history, terrestrial surface lifeless. Cyanobacteria likely existed on land 1. 2 billion years ago. Around 500 million years ago, small plants, fungi, and animals emerged on land. Since colonizing land, plants have diversified into roughly 290,000 living species. Land plants defined as having terrestrial ancestors, even though some now aquatic. Plants supply oxygen and ultimate source of most food eaten by land animals. Concept 29. 1: land plants evolved from green algae. Green algae called charophytes are the closest relatives of land plants. Land plants share key traits with only charophytes. Note land plants are not descended from modern charophytes, but share common ancestor with modern charophytes. In charophytes a layer of a durable polymer called sporopollenin prevents exposed zygotes from drying out.
