BIOL 084 Chapter Notes - Chapter 13: Soltyrei, Exponential Growth, Ecological Succession
Document Summary
Must live in moist environments because they have no root or xylem and must absorb water by diffusion tiny because they lack the lignin-fortified tissue necessary to support tall plants on land. Tracheophytes transport vessels, xylem, and phloem ancient seedless plants, reproduce by spores. Modern plants, reproduce by seed gymnosperms conifers, cone-bearing plants survive under dry conditions angiosperms flowering plants. Waxy coating on leaves (cutin) prevents excess water loss gametangia: protective jacket of cells that prevents gametes and zygotes from drying out. Sporopollenin: tough polymer resistant to most kinds of environmental damage and protects plants in a harsh terrestrial environment seeds and pollen have protective coat that prevents desiccation disperse offspring reduction of primitive gametophyte (n) generation. Roots secondary growth lateral growth or an increase girth cells provided by lateral meristem absorb nutrients from the soil, anchor the plant, and store food.