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The plant morphologist goes further, and discovers that the spines of cactus also share the same basic structure and development as leaves in other plants, and therefore cactus spines are homologous to leaves as well. This aspect of plant morphology overlaps with the study of plant evolution and paleobotany.hese two systems are common to nearly all vascular plants, and provide a unifying theme for the study of plant morphology. By contrast, the reproductive structures are varied, and are usually specific to a particular group of plants.
Plant cells have a nucleus with chromosomes and DNA, and they have mitochondria. Those are common to all eukaryote cells. But in some ways they are different from animal cells and the cells of other eukaryotes. Plant cell structure. 1  They have cell walls composed of cellulose and some other compounds. The cell wall gives the cell a definite shape. 2  There are special cell-to-cell communication pathways known as plasmodesmata. 3  These are pores in the cell wall through which the cell content of adjacent cells (including endoplasmic reticulum) are continuous. 4  They have plastids.