Siemenperäiset

Siemenperäiset, also known as seed plants, are a group of land plants that produce seeds. They are one of the two major groups of land plants, the other being the non-seed plants. Seed plants are characterized by their ability to produce seeds, which are reproductive structures that contain an embryo and a food supply. This adaptation allows seed plants to reproduce without the need for water, making them well-suited to a variety of environments.

Seed plants are further divided into two main groups: gymnosperms and angiosperms. Gymnosperms are seed plants that do not produce flowers. They include conifers, cycads, ginkgos, and gnetophytes. Angiosperms, on the other hand, are seed plants that produce flowers. They are the most diverse group of plants, including trees, shrubs, herbs, and grasses.

The evolution of seed plants is thought to have occurred around 360 million years ago. The first seed plants were likely small, herbaceous plants that produced seeds to reproduce. Over time, seed plants evolved to become larger and more complex, eventually giving rise to the diverse array of plants we see today.

Seed plants play a crucial role in many ecosystems. They provide food and habitat for a wide range of animals, and they help to cycle nutrients through the environment. They are also important economically, as many seed plants are used for food, fuel, and other purposes.