AP BIOLOGY

Detailed explanation-1: -A wide seedless vascular plant phylum Pteridophyta that consists of 15000 species. These plants are common and abundant throughout the world. The ferns are homosporous with photosynthetic gametophytes.

Detailed explanation-2: -The largest group of living seedless vascular plants-and probably the most familiar-are the ferns with about 12, 000 species, over two‐thirds of which are tropical. Ferns are an ancient group.

Detailed explanation-3: -Angiosperms are plants that produce flowers and bear their seeds in fruits. They are the largest and most diverse group within the kingdom Plantae, with about 300, 000 species. Angiosperms represent approximately 80 percent of all known living green plants.

Detailed explanation-4: -High-elevation vascular plants The five highest vascular species of the world belong to five different families: Asteraceae, Brassicaceae, Caryophyllaceae, Saxifragaceae and Primulaceae.

Detailed explanation-5: -Vascular plants include the clubmosses, horsetails, ferns, gymnosperms (including conifers), and angiosperms (flowering plants). Scientific names for the group include Tracheophyta, Tracheobionta and Equisetopsida sensu lato.