BIO153H5 Chapter Notes - Chapter 30: The Immature, Evolutionary Developmental Biology, Coevolution
Document Summary
Chapter 30 - plant diversity ii: the evolution of seed plants. Chapter 30 plant diversity ii: the evolution of seed plants. Americas: this was the single most important cultural change in the history of humanity, and it made possible the transition from hunter- gatherer societies to permanent settlements. Concept 30. 2 gymnosperms bear naked seeds, typically on cones: the ovules and seeds of gymnosperms ( naked seeds ) develop on the surfaces of modified leaves that usually form cones (strobili). o. In contrast, ovules and seeds of angiosperms develop in enclosed chambers called ovaries: the most familiar gymnosperms are the conifers, cone-bearing trees such as pine, fir, and redwood. The four phyla of extant gymnosperms are cycadophyta, Coniferophyta: the term conifer comes from the reproductive structure, the cone, which is a cluster of scalelike sporophylls, although there are only about 600 species of conifers, a few species dominate vast forested regions in the northern.
