AP BIOLOGY

Detailed explanation-1: -Angiosperms. Angiosperms are seed-producing flowering vascular plants. The seeds are enclosed in fruits. These plants are called flowering plants due to the key role of flowers in reproduction.

Detailed explanation-2: -The vascular plants are further classified into seedless and seed plants: Seedless plants have an alternation of generation in their life cycle. They have a diploid sporophytic stage. Here, the spores are formed which later becomes the gametophyte.

Detailed explanation-3: -There are three main classifications of flowering plants: perennials, biennials and annuals.

Detailed explanation-4: -While there are many ways to structure plant classification, one way is to group them into vascular and non-vascular plants, seed bearing and spore bearing, and angiosperms and gymnosperms. Plants can also be classified as grasses, herbaceous plants, woody shrubs, and trees.

Detailed explanation-5: -The ferns, gymnosperms, and flowering plants are all vascular plants. Because they possess vascular tissues, these plants have true stems, leaves, and roots.