Presentation on theme: "Plants Make the World Go Round"— Presentation transcript:
1 Plants Make the World Go Round Interest GrabberPlants Make the World Go RoundLife as we know it today could not exist without plants. Plants provide us with many essential items other than food.1.With your partner, list five items you use daily that are byproducts of plants.Should have included Oxygen, food, fruit, wood, and water.2.With your partner, list three items that plants must get from animals—either directly or indirectly.should include some of the following items: water, carbon dioxide, nutrients (from decaying animals), soil.
2 22-1PlantsPlants are multicellular eukaryotes that have cell walls made of cellulose. That carries out photosynthesis using green pigment chlorophyll a and chlorophyll b.
3 Plant life cycleHas two alternating phases a diploid (2N) and a haploid (N) known as alternation of generation.Diploid phase is known as a sporophyte (meoisis) or spore producing plant.Haploid phase is know as gametophyte (mitosis) or gamete-producing plant
5 Looking at figure 22-2 Answer the question below. Which generation of a plant is diploid and which is haploid?2. Which generation produces gametes?What does the sporophyte produce?What process produces spores?The sporophyte is diploid and the gametophyte is haploidThe gametophyteSporesMeoisis
6 What Plants Need To Survive 1. Water and minerals for the survival of their cells2. Gas exchange to support cellular respiration3. Movement of water and nutrients to carry upward from the soil to the leaves.4. Sunlight for photosynthesis
7 Early plants The first plants evolved from algae Algae Plants Study the picture above how are green algae and plants alike?Both have chlorophyll, stores carbohydrates, and have cell walls.
8 Figure 22–6 (Pg. 554) Plant Groups What are the fourMain groups of plants?What do mossesand their relativeslack that all otherplants have?What do mosses and their relative lack that all other plants have?Flowering plantsCone-bearing plantsFerns and their relativesMosses and their relativesGreen algae ancestorFlowers; Seeds Enclosed in FruitSeedsWater-Conducting (Vascular) TissueMosses, Ferns,Cone-bearing, andFlower-bearing plantsVascular TissueHow do the seeds of floweringplants differ from the seeds ofcone-bearing plants?Flowering plants haveseeds enclosed in fruit
9 Chapter 22BryophytesAre non-vascular plants-lacking vascular tissue that does not conduct water or nutrients.Depends on water for reproduction producing sperm that must swim in the water tofertilize a eggAbsorbs waterby osmosisIncludes mosses,liverworts, andhornworts22-2
10 Mosses Page 557 Most common bryophytes Grown in areas that are CapsuleStalkSporophyteMost common bryophytesGrown in areas that areabundant in waterCan survive in polarregionsContain rhizoids-are long,thin cells that anchor them intothe ground and absorb water andminerals from surrounding soil.Water moves from cell to cellby the rhizoids.GametophyteStemlike structureLeaflike structureRhizoids
11 Figure 22–11 The Life Cycle of a Moss Section 22-2Mature sporophyte (2N)Gametophyte (N)Young sporophyte (2N)Zygote (2N)Sperm (N)Egg (N)Spores (N)Capsule (sporangium)Protonema (young gametophyte) (N)Male gametophyteFemale gametophyteAntheridiaArchegoniaHaploid (N)Diploid (2N)MEIOSISFERTILIZATION
12 Seedless Vascular Plants 22-3Seedless Vascular PlantsEstablished a evolutionary transport systemTracheids is a new type of cell specialized to conduct water.These tracheids was the key cell in xylem a transport subsystem that carries water upwards from the roots to every part of the plants.Phloem transports nutrients and carbohydrates produced by photosynthesis.Both of vascular tissue the xylem and the phloem can move fluids through the plant body even against gravity.
13 Seedless Vascular plant Club mossesHorsetailsFerns-have true vascular tissue, strong roots, and creeping underground stems called rhizomes and large leaves called fronds-can live in areas withlittle light and are mostlywet or seasonally wet.
15 Interest Grabber Eat Your Seeds! A seed contains both the embryo of a plant and a food supply for that plant. If you have eaten corn, you’ve eaten a seed. Do you like hamburger buns with sesame seeds on them? That’s another kind of seed you’ve eaten.After you answer the following questions, exchange papers with a partner to see how many of the same seeds you listed.Interest Grabber1. In addition to sesame seeds, what are some other seeds that are found in or on top of loaves of bread?Most students will list poppy seeds and caraway seeds. In addition, some “multi-grain” breads contain millet and flax seeds.2. In addition to corn, what are some other seeds that are eaten as “vegetables”?Peas and all types of beans, such as lima beans, black beans, kidney beans, and so on3. What are some seeds that you have eaten as snack foods?Sunflower seeds, pumpkin seeds, peanuts4. What types of nutrients are found in seeds?Carbohydrates, proteins, and fatsDo seeds have the same nutritional value for plants as they do for animals? Explain your answer.Yes. Plants and animals use the same nutrients to live.
16 Countdown to TAKS Choose the best answer. Leon tosses two number cubes without looking at them. A friend tells Leo that the total came out to be an odd number. What is the probability that the total is 7?F. 1/6 G. 2/9 H. 1/3 J. 1/2
17 Countdown to TAKS F Incorrect The probability of rolling a 7 is 1/6 without taking into account whether the number is odd or even.G Incorrect; How many ways can you come up with a 7?J Incorrect; make a chart showing the results for each die. Count up how many ways come up 7.H Correct There are 6 combinations of numbers that equal 7: (1,6), (2,5), (3,4), (6,1), (5,2), (4,3). There are 6 X 6 = 36 possible combinations but only 18 are odd. The probability of the odd total being 7 is 6/18=1/3.
18 22-4Seed PlantsAre divided into two groups gymnosperms and angiosperms.Gymnosperms bear their seed directly on the surface of conesAngiosperms called flowering plants, bear their seeds within a layer of tissue that protects the seed.
20 Compare/Contrast Table Section 22-4Comparing Features of Seed PlantsFeatureSeedsReproductionExamplesGymnospermsAngiospermsBear their seeds on conesCan reproduce without water; male gametophytes are contained in pollen grains; fertilization occurs by pollinationConifers, cycads, ginkgoes, gnetophytesBear their seeds within flowersCan reproduce without water; male gametophytes are contained in pollen grains; fertilization occurs by pollinationGrasses, flowering trees and shrubs, wildflowers, cultivated flowers
21 Seeded Plants Reproduction Seeded plants have adaptations allowing them to reproduce without water.1. Seeds2. Pollen3. Cones and Flowers
22 1. Seeds Figure 22–19 The Structure of a Seed Section 22-4Seed coatEmbryoStored food supplySeedWingBThe Structure of a Seed is the embryo (in its early stages of development) of a plant that is encased in seed coat that is its protective covering and surrounded by a food supply
23 2. PollenPollen is the male gametophyte contained in tiny structures called a pollen grain. Pollen is then carried by the wind to a female reproductive structure known as pollination.
24 3. Cones and FlowersThe gametophytes of seed plants grow and mature within sporophyte structures called cones. Which are the seed bearing structures of gymnosperms, and flowers.
25 Cone Bearers Gymnosperms meaning “naked seed”; plants that reproduce with seeds that are exposed. 4 Main types of cone bearersGnetophytes found in desert environmentsCycads palm like plants the produce large conesGinkgoes common when dinosaurs existedConifers mainly your Christmas trees
27 22-5Flowering Plants Angiosperms (meaning enclosed seed) develop a unique reproductive organs known as flowers containing ovaries, which surround and protect the seedHow to classify AngiospermsMonocots and DicotsWoody and HerbaceousAnnuals, Biennials, andPerennials (life span).
28 Section 22-51. Monocots and Dicots comparison -Monocots have one seed leaf -Dicots have two seed leafs -Resulting in a cotyledon which is the first leaf produces from the embryo of a seed plant.MonocotsDicotsSingle cotyledonParallel veinsFloral parts often in multiples of 3Vascular bundles scattered throughout stemFibrous rootsTwo cotyledonsBranched veinsFloral parts often in multiples of 4 or 5Vascular bundles arranged in a ringTaprootSeedsLeavesFlowersStemsRoots
29 2.Woody and HerbaceousDivided into two groups according to their stemsWoodiness –are primarily made of plants with cells having thick walls that support the plant body (examples include grapes and ivys).Herbaceous- are stems that are smooth and nonwoody (examples include roses and blueberries).
30 Classifying angiosperms 3. Life Span Section 22-5Plantsare categorized asAnnualsBiennialsPerennialsthat complete their life cycle inthat complete their life cycle inthat complete their life cycle in1 growing season2 yearsMore than 2 years
32 Page 580 Monocots Dicots Single cotyledon Two cotyledons Seeds Branched veinsLeavesParallel veinsFloral parts often in multiples of 3Floral parts often in multiples of 4 or 5FlowersVascular bundles scattered throughout stemVascular bundles arranged in a ringStemsRootsFibrous rootsTaproot