Presentation on theme: "Chapter 23 Reproduction in Plants"— Presentation transcript:
1 Chapter 23 Reproduction in Plants Section 1: Introduction to Plant ReproductionSection 2: FlowersSection 3: Flowering Plants
2 Vascular Seed Producing Plants Angiosperms“flower seed”Seeds contained within fruitGymnosperms“naked seed”Seeds within cones
3 Angiosperms Produce flowers, pollen, fruit Seed enclosed in fruit Fruit: Ripened part of the plant where seeds are formedMore than ½ of all known plant species are Angiosperms2 types: Monocots & Dichots
5 Monocots Have one cotyledon: food storage organ of seed Plants have parallel veins in leavesVascular bundles are scattered in stemsNetlike rootsFlower parts in multiples of 3Seed sprouts 1 leafEx: grasses, lilies, corn
6 Dicots Have 2 cotyledons Netlike veins in leaves Vascular bundles in a circle inside stemTaproots: anchor firmly in groundFlower parts in multiples of 4 or 5Seed sprouts 2 leavesEx: oak, holly, daisies & roses
7 Gymnosperms Non-flowering seed plants Ex: Conifers Seeds are within conesSeeds found on scales of coneShallow rootsMale cone produces pollenFemale cone produces seedsFemale coneMale cone
9 Conifer Reproduction and Life Cycle Chapter 23Reproduction in Plants23.1 Introduction to Plant ReproductionConifer Reproduction and Life CycleConifers produce twotypes ofspores thatdevelopinto maleand femalegroups.
10 At the base of a female cone are two ovules. Chapter 23Reproduction in Plants23.1 Introduction to Plant ReproductionFemale ConesAt the base of a female cone are two ovules.Each ovule has a produces megaspores that develop in to the female gametophyte.
11 Each male cone contains hundreds of sporangia. Chapter 23Reproduction in Plants23.1 Introduction to Plant ReproductionMale ConesEach male cone contains hundreds of sporangia.The male gametophyte produces sperm, or pollen grains.
12 Chapter 23Reproduction in Plants23.1 Introduction to Plant ReproductionPollinationPollination occurs when the pollen grain from a male plant lands on the female reproductive structure.
14 Pollination Mechanisms Chapter 23Reproduction in Plants23.2 FlowersPollination MechanismsFlower adaptations that relate to pollination include flower size, shape, color, and petal arrangements.Animal pollinationWind pollinationSelf pollination
15 Flower Structure Petals: colored portion of flower Sepals: outermost portion of flower
16 Female Parts: Pistilstigma: sticky top of pistil for pollen to be depositedstyle: stalk connecting stigma to ovaryovary: contains ovule, where eggs are foundovule: will become seeds if fertilized
17 Male Parts: Stamen Anther: Produces pollen grains. Filament: stem-like structure that supports the anther.