1. 22-1 Introduction to Plants Chapter 22Plant Diversity

2. Sporophyte Diploid, or spore-producing, phase of an organism.

3. Gametophyte Haploid, or gamete-producing, phase of an organism.

4. Key Concept Plants are multicellular eukaryotes that have cell walls made of cellulose. They develop from multicellular embryos and carry out photosynthesis using the green pigments chlorophyll a and b.

5. Key Concept The lives of plants center on the need for sunlight, water and minerals, gas exchange, and the transport of water and nutrients throughout the plant body.

6. Key Concept The first plants evolved from an organism much life the multicellular green algae living today