AP Bio Prelab 13

AP Bio Prelab 13 - Part I Intro: Floral Anatomy All...

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Part I Intro: Floral Anatomy All Angiosperms have similar flower structures Pedicel - the supporting stalk of the flower Receptacle - the end of the flower stem located at the center base of the flower Calyx - the outermost whorl (circle) of floral appendages Composed of Sepals - small, leaf-like structures that form the buds to protect inner areas Corolla - the second-outermost whorl (circle) of floral appendages Composed of Petals - brightly pigmented leaf-like structures that serve as additional protection during early stages, and attract pollinators in later stages Stamens - the male reproductive structures inside the ring of Petals Filament - the stalk supporting the Anther Anther - the sac containing Microsporangia that produce Microspores , which divide by Mitosis to become Male Gametophytes (Pollen) Carpel ( Pistil )- the female reproductive structure inside the ring of Stamens Stigma - the top of the Carpel that produces a sticky substance that catches pollen Style - the long tube through which Pollen Tubes grow to the Ovules Ovary - the basal region containing Ovules (Megasporangia) o Megaspores - located in the Ovules Produces a Embryo Sac (Female Gametophyte) Double Fertilization Each Pollen Grain of an Angiosperm possesses 2 Sperm One Sperm unites with the Egg inside the Ovule in the Ovary to form a Zygote One Sperm unites with the 2 Nuclei of the Embryo Sac
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AP Bio Prelab 13 - Part I Intro: Floral Anatomy All...

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