Biology 102Lecture 18Outline of Last Lecture:I. Clicker QuestionsII. Protist EvolutionIII. Plants and FungiOutline of Current Lecture:I. Clicker QuestionsII. Plant EvolutionClicker QuestionsFungi are found associated with the earliest plant fossils. Fungi may have helped plants become terrestrial by…a. Killing the bacterial enemies of plants b. Providing carbon compounds in return for sugarsc. Stocking the soil with organic matterd. Forming mycorrihizal associations with plants and by decomposing organic matterMosses and ferns…..a. Found in moist, shady environments onlyb. Are incompletely adapted to life on landc. Have flagellated sperm and require water for reproductiond. All of the aboveAngiosperms that use pollinators for transfer of pollen to the egg, will make large, showy flowers that often contain nectar. In addition, the structure of the flower is usually suitable for the pollinators.a. Trueb. False Which combination of traits would you expect to in the female and male flowers of a WIND pollinated plant?a. Female:drab with no carpel; male:drab with small anthersb. Female: showy with small stigma; male: showy and heavily scented with small anthersc. Female: drab with large sticky stigmas; male:drab with few, small anthersd. Female: drab with large sticky stigmas; male: drab with many large anthersPlant EvolutionBiology 102Green algea: evolved traits to help it live on land- Moss- oldest and not fully adapted to landApical meristems: growth producing region of the plant- As it grows its increasing in volume - We see these in land plants Vascular Tissue: it’s the human vessels and veins equivalent- It delivers sugar, moisture, photosynthesis all over the plantThe strongest plants have more lignin- Cells walls are strengthened by ligninStomata: tiny pore that allow for gas exchange - They can open and close the tiny pores due to circumstancesGemosperms and angiosperms: have gametes and protective structure- Have some protective casing for the embryoVascular Plants:- Heavily dependent on moisture- Ferns adapted and got bigger but have to stay in moist shady enviroments because of flagellated spermSeeded Plants:- Some spread pollen with wind- Some are carried by pollenators (animals)- Ex. gymnosperms (pine
View Full Document
Unlocking...