reproductive system, skeletal system, and digestive system.
In flowering plants, one sperm nucleus fertilizes the egg, and the other nucleus joins forces with two additional nuclei inside the ovule to form triploid endosperm. Thus, only flowering plants undergo double fertilization.
Angiosperms are flowering plants that create fruits that are seed-bearing. With around 300,000 species, they are the most numerous and diverse group within the kingdom Plantae. Approximately 80% of all known extant green plants are angiosperms.
Parenchyma, collenchyma, and sclerenchyma cells make up the majority of the stem and other plant organs. The most prevalent plant cells are parenchyma cells. The stem, the root, the interior of the leaf, and the fruit pulp all contain them.
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