AnnouncementsPlant EvolutionInformation Flow and Storage in Plants23_BIO130_0408144/08/2014Bio 130 TR 12:40-1:55p Announcements- Assignment 2 due Tuesday April 15th on Safe assign and hard copy due in class.- SAIS evaluation for 3 points extra credit- Study guide for final uploaded later today- Final – April 30th at 10:15 AM- Make the FBI paper very clear, you can use the exact wording from the assignment sheet. Make your example explicitPlant EvolutionObjective: Understand how important traits influenced the evolution of plantsLand plants are related to the protists green algae. They both have chloroplast and cellulose cell walls. Plants are photoautotrophs. They fix carbon and make energy (ATP) from sunlight through photophosphorylation. Chloroplasts evolved log before plants diverged on the evolutionary tree.PlantStructure Describe Structure FunctionWhy was this important to plants’ evolutionary history?CuticleWaxy film made of lipids and hydrocarbonsA protective, waterproof barrierWater conservationFlowerFemale + male organs and petalsOvary houses ovules and the flowers attract pollinatorsMore efficient pollinationFruitDevelops from fruit, includes seeds and edible flesh Provides nutrition for a seed dispersing animalMore effective dispersalPollenA fine powder of male gametes with a tough outer coat Prevent desiccationand lightweight for dispersal Allowed gametes to be dispersed in dry environmentsSeedFertilized zygote  embryo surrounded by nutrients and a coatingProvides food for embryoAllows dispersal for less competition for nutrientsStomataPores surrounded by guard cellsGas exchange/prevents water lossObtain CO2 for photosynthesis/ allowed plants to live in dry conditionsVascularTissueHollow tubular cells made of ligninTransports water throughout plants, supports structure Allows upright growthInformation Flow and Storage in PlantsSexual reproduction through meiosis with alternation of generation (all living plants)Angiosperms – evergreens, gingkoes and redwoodsBiotic factors such as animal pollinators affected the evolution of flowers and fruitOrigins of Important Plant