BIOA02H3 : Lec08 - From Tree to Seed II.doc

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Mary Olaveson

Document Summary

Slide seven self incompatibility: biochemical interaction. Slide eight : no fertilization with own pollen, present in. Slide nine sex slaves of the plant kingdom. Ingenious solution of angiosperms: non directed and directed mobility of pollen to seek egg, non directed. Biotic: i. e. bees, today: extreme diversity in the types of flowers, invention of flowers: Slide twelve parallel insect and angiosperm radiation: coevolution of plants and insects. Slide thirteen forces behind the evolution of flowers: main forces, assurance of seed set. Mechanics bring female and male gametes together to replace the parents (survivability: inbreeding avoidance. Slide sixteen wind pollination: 10% of all plants are wind-pollinated, 18% of plant families have wind-pollinated species in them, wind pollination is more common in/at, higher latitude and altitude, dry environments, open vegetation, island floras. Slide seventeen characteristics of wind pollinated plants: small inconspicuous flowers, no special colors. I. e. no animal dispersal: no nectar. Non directed vector: i. e. no animal dispersal, long filaments.