AP BIOLOGY

Detailed explanation-1: -The two main groups of seed plants, the angiosperms (flowering plants) and gymnosperms have egg cells within their respective female reproductive structures, but, strictly speaking do not have male gametes, in the sense of separate cells, but only gamete nuclei.

Detailed explanation-2: -Seeds are what we call the eggs of plants: they are equivalent to the eggs that animals lay. They contain an embryo with a little store of food called the “endosperm” for it to use as it develops.

Detailed explanation-3: -These seed plants fall into two groups, angiosperms and gymnosperms. Angiosperms are the flowering plants. Their seeds develop inside a female reproductive part of the flower, called the ovary, which usually ripens into a protective FRUIT. Gymnosperms (conifers, Ginkgo, and cycads) do not have flowers or ovaries.

Detailed explanation-4: -All fully developed seeds contain an embryo and, in most plant species, a store of food reserves, wrapped in a seed coat.

Detailed explanation-5: -Development of sperm and egg cells in plants Within the flower, sperm cells are produced by pollen at the tips of stamens, while egg cells develop in ovules, tiny structures embedded in the ovary at the base of the pistil.