Tracheophytes are a group of vascular plants that include ferns, conifers, and flowering plants. They are characterized by the presence of specialized tissues called xylem and phloem, which transport water, nutrients, and food throughout the plant. Tracheophytes are essential for terrestrial ecosystems as they contribute to carbon fixation and provide habitat and food for various organisms. Their ability to grow in diverse environments makes them a vital component of the Earth's biodiversity.