Section 22-3 Seedless Vascular Plants (pages 560-563) TEKS FOCUS: 10C Characteristics of plant systems and subsystems; 138 Methods of reproduction, growth, and development; TEKS SUPPORT: 7A Evidence of change in species; 8A Classify organisms This section explains how vascular tissue is important to ferns and their relatives. It also describes the characteristics of three phyla of spore-bearing plants and describes the stages in the life cycle of ferns. Evolution of Vascular Tissue (page 560) 1. What is vascular tissue? 2. What kind of cells did the first vascular plants have that were specialized to conduct water? 3. Circle the letter of each sentence that is true about tracheids. They are hollow cells. They are connected end to end. Their thick cell walls resist pressure