The sepals and petals are usually the most conspicuous nation. Preserved specime

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The sepals and petals are usually the most conspicuous nation. Preserved specimens of Li parts of a flower, and a variety of flower types are described by their characteristics. In radially symmetrical flowers such as tulips, the different whorls of the flower consist of simi- larly shaped parts that radiate from the center of the flower and are equidistant from each other. In other flowers such as snapdragons, one or more parts of at least one whorl are different from other parts of the same whorl. These flowers are usually bilaterally symmetrical. Ranunculus (buttercup) may also to study and dissect Alternation of Generations in Flowering Plants The life cycle of flowering plants involv multicellular haploid stage with a multi as is typical for all plants (see fig 30 loid sporophyte produces haploid sp haploid spore develops into the gan and cellular differentiation. In angios is the large, mature organism recognize. The gametophyte within t a pollen grain (that contains a sperm sac (that produces an egg) within an your textbook's description of alterna Procedure 31.1 Examine flowers and their parts Obtain a flower provided in the laboratory. Remove the parts of the flower, beginning at the lower, outside rosettes of sepals and petals Locate the petals and sepals and determine their arrangement and point of attachment. I. 2. 3. uestion Production of spores in the s you describe this flower is part of a larger process called ing plants produce two types of sp gametogenesis. Microsporogenesis, Produc of Pollen, and Microgamet Remove the petals and sepals. Locate and remove a stamen and place it on a slide. Examine the stamen with low magnification. Examine a prepared slide of pollen grains.Use high magnification to locate the generative and tube nucleus of a pollen grain. The generative nucleus 4. · Microsporogenesis is the productio 6. microsporangia of a flower's anthe spore mother cells (microsporo microspores grow and mature i is usually small, spindle-shaped, and off center (youalso known as pollen grains (ig cannot see it easily). The tube nucleus is larger and in a mature pollen grain include a centered. Yo'll learn more about pollen nuclei later tive nucleus) and a generative nu in this exercise Locate the gynoecium of the flower, and make lon- gitudinal and transverse sections. The gynoecium consists of one or more fused carpels, each with an interior cavity called a locule containing ovules. ion 2 How many carpels (locules) are apparent? minate and grow a tube through t tube nucleus controls the growth generative nucleus replicates to p Pollen of some plants caus However, studies of pollen are in the treatment of allergies. For e pollen brought up in sediment co brown to black pollen indicate to deposits and indicate that a well gas. Orange pollen indicate the with high-quality oil productios of fossil pollen tells us about th and climatic change through th ancient seas and their shoreline 7· b. How many ovules are developing in each locule? Examine the other types of flowers available in the lab. Repeat procedure 31.1 to guide your exami- 8.

Explanation / Answer

Take a flower and describe its phenotypic characteristics, for example here is the description of a normal flower.

1. A beautiful angiospermic flower is bisexual. It has colorful petals with green sepals. The sepals help in photosynthesis and protection of the ovary. The flower has "male" and "female" parts both. Pollen-bearing part of male reproduction system (androecium) called the stamen composed of the filament and the anther. The "female reproduction system” (gynoecium) knows as the pistil that is composed of the style, the stigma, and the ovary.

2. Flowers have different carpel numbers. They are leaves of pistils that protect the female reproductive part of flower. For example, one carpel is in legumes plants (Fabaceae) and multiple carpels like in strawberry.

3. Flowers have different numbers of locules and ovules. Locule is the chamber containing ovules. For example, in lilium there is two ovules per locule and total three locules are present.

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