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Describe the structure of a seed. Include the following: Seed coat, endosperm and embryo.
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- Sketch a seed of a gymnosperm and of a monocot. Label the embryo, seed coat, and nutritive tissue (giving its specific name). Indicate the ploidy of each structure (haploid, diploid, or triploid).Describe the structure of a flower. Include the following: sepals, caylx, petals, corolla, carpel, stigma, style, ovary, ovule, stamen, anther and filament.Diagram the structure of a mature angiosperm and amature gymnosperm seed, indicating the ploidy (1n, 2n, 3n) ofeach tissue and its role in seed development and germination.
- Examine the shoot system of a mature plant (Coleus blumei). Identify the shoot tip, nodes, internodes, leaves, and axillary buds. Each unit of stem that consists of a leaf, axillary bud and internode is referred to as a phytomere. Note that axillary buds always occur above a leaf. Axillary buds give rise to branch shoots. Thus, branching in a shoot system is exogenous (of external origin). How does this compare to branching in a root system?In some of the fruits, the floral parts are persistent even up to maturity. Identify these parts. Consider Psidium guajava and Oryza sativa. What are the structures attached at the upper part of the two fruits.The embryo of monocotyledonous seed consists of one large, shield shaped cotyledon. What is it known as?