BIO 254 Final Exam Accurate 100%

Trends in Plant Evolution Chlorophyta ancestor -ANSWER ancestor of modern land plants: - Spores produced in tetrads - Parental plant retains fertilized egg - Alteration of generations: haploid gametophyte & diploid sporophyte -Biochemical similarity: chlorophylls & starch Trends in Plant Evolution Vascular tissue -ANSWER -Lower devonian --first fossil evidence of vascular tissue and stomates -Mid devonian --evidence of secondary xylem - Protogymnosperms: secondary growth and seed Trends in Plant Evolution Seeds -ANSWER - Multicellular -Contains embryo with nutrition - Protective coat - Can disperse spatially and temporally Trends in Plant Evolution Pollen -ANSWER - Internal fertilization -Doesn't need water for fertilization - Dependent on evolution of heterospory Trends in Plant Evolution Flowers -ANSWER - Cretaceous: earliest fossils - Steps: 1. group of ovules 2. fertile axis of a leaf 3. fusion of fertile axis with leaf 4. single ovule 5. carpel formation Evolution of Fungi -ANSWER - Choanoflagellate protozoan ancestor - Common ancestor with animals: 1. mitochondrial design