Presentation on theme: "Bellringer Think about what you know about plants, and come up with as comprehensive a definition as possible. Name me two very different plants. What."— Presentation transcript:
1BellringerThink about what you know about plants, and come up with as comprehensive a definition as possible.Name me two very different plants. What makes them different?
2Classification started in the 1700’s but there is still a lot of work to do!
3Objective: To go through plants Agenda: BellringerNotesStart Tax WS 2 while work is passed backHomework:WS due next class
11Adaptations of plantsVascular tissue: tubes in plants through which water and sugars moveXylem: carries waterPhloem: carries sugarConserving water:Waxy outer covering called a cuticleStomata: holes in the cuticle through which CO2 can enter and O2 can leave
12SeedsA seed is an embryo surrounded by a food supply and protective coatThey have the following adaptationsDispersal: seeds have mechanisms to be moved to new locationsNourishment: contain a food supplyDormancy: seeds may lie dormant for years waiting for proper condition
13FlowersReproductive structuresDraw and label the parts of a flower
14PollinationPollen is produced on the anther (a pollen grain has 2 sperm)The pollen lands on the stigmaThe pollen tube grows down to the ovuleOne sperm nucleus fertilizes the egg and becomes the embryoThe other sperm nucleus fertilizes two extra nuclei in the ovule, developing into the endospermEndosperm: the nutrients which surround and feed the embryo
15FruitA fruit is a mature ovary that contains one or more seeds (based on how many ovules the flower had)It often provides more nourishment for the seed
16Bellringer “There is fungus amongus” How many ways can you think of that plants and fungi differ?What is similar about them?
17Agenda Objective: To introduce Fungus Agenda: Homework: Bellringer/discussionNotesGrade WSHomework:N/A
19Characteristics of Fungi EukaryoticMostly multi-cellularNOT similar to the Plant KingdomHeterotrophicBody made of long filamentous cells called hyphaeHas cell walls made of chitin (same as exoskeleton of insects)
20Structural Info Hyphae grow into a tangled mass called a mycelium When you see a mushroom, you are seeing the myceliumFungi is “eating” whatever it is growing onHyphae secrete enzymes that digest food outside the body, then absorb itThe above ground portion is only the reproductive structure
24Reproduction in Fungi Each spore becomes a new individual The spores can withstand a wide temperature/condition range, and will start growing when they land somewhere moist with food presentAir currents generally carry them
25Mutualisms with fungus Fungus form two important mutualisms with other organisms in nature:Mycorrhizae: fungus grows around the roots of plants, and provides water & minerals while the plant gives sugar from photosynthesis
26Cont’d Lichens: a fungus growing with an algae (or cyanobacteria) Fungus absorbs water, algae makes sugarable to grow in deserts and the arcticConsidered “environmental indicators” because they are sensitive to the pollutants in the atmosphere.When they die, pollution is likely present