BIOL 1108 Lecture Notes - Lecture 19: Sexual Reproduction, Starch, Selaginella
Document Summary
Bryophytes form persistent, photosynthetic gametophytes and small, unbranched sporophytes; today they grow in environments where the ability to pull water from the soil does not provide an advantage. Spore-dispersing vascular plants today are primarily small plants that grow in moist environments, but in the past included tall trees. Gymnosperms produce seeds and woody stems and are most common in seasonally cool or dry regions. Angiosperms are distinguished by flowers, fruits, double fertilization, and xylem vessels; their diversity is the result of traits that increase the efficiency of completing their life cycle and building their bodies. Angiosperms make up approximately 90% of all plant species found today. Plants: importance, review: the tree of life. Green algae: characteristics, the life cycle of coleochaete review, the transition to land and the first land plants. Evolutionary histories reflect or are composed of events of innovation, diversification, extinction, survival, and more diversification: any lineage that survives has the potential to continue to evolve.