What is a seed plant?
Q: What is a seed plant?
A: A seed plant is a group of plants that includes gymnosperms and angiosperms. They are also known as spermatophytes or phanerogams and have three parts to their seeds - an embryo, a supply of nutrients for the embryo, and a seed coat.
Q: What environments do seed plants dominate?
A: Seed plants dominate almost all land environments.
Q: How many living groups of spermatophytes are there?
A: There are five living groups of spermatophytes - cycads, ginkgo, conifers, gnetophyta, and angiosperms.
Q: What type of plants were common in the Permian period?
A: In the Permian period, fossil seed ferns (Pteridospermatophyta) were one of the earliest successful groups of land plants. Forests dominated by these seed ferns were common during this time.
Q: What was Glossopteris?
A: Glossopteris was a widespread tree genus in the ancient southern supercontinent of Gondwana in the Permian period.
Q: When did angiosperms radiate?
A: Angiosperms radiated during the Upper Cretaceous period.
Q: Are angiosperm still dominant today?
A: Yes, angiosperm are still dominant today although there are still large pine forests in the northern hemisphere.
