1 / 13

Seedless Plants

Seedless Plants. Pgs. 78 - 81. Mosses and Liverworts. One group of seedless plants is nonvascular plants like mosses and liverworts. They are small, grow on soil, tree bark, and rocks. Without a vascular system they live in places that are always wet.

kalista
Download Presentation

Seedless Plants

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Seedless Plants Pgs. 78 - 81

  2. Mosses and Liverworts • One group of seedless plants is nonvascular plants like mosses and liverworts. • They are small, grow on soil, tree bark, and rocks. • Without a vascular system they live in places that are always wet. • They don’t have stems, roots or leaves and each cell must absorb water from the environment .

  3. Rock to Rock Carpeting • Mosses live together in large groups covering soil or rocks like a mat. • Each plant has a slender hair like thread of cells called a rhizoid. • The rhizoid helps hold the plant in place. • They also have a leafy stalk

  4. Liverworts • They are small, nonvascular plants that usually live in damp areas. • The gametophyte can be leafy and moss like or broad and flattened. • Rhizoids are present and help anchor the plant

  5. Importance of Mosses and Liverworts • These are the first plants to inhabit a new environment such as newly exposed rock. • When they die they form a thin layer of soil in which new plants can grow. • Mosses also provide nesting materials for birds • Peat mosses can be used as a fuel to burn.

  6. Ferns, Horsetails, and Club Mosses • Ancient members of this group used to be quite large. • However, modern descendants are typically much smaller than previous ancestors.

  7. Ferns • Ferns grow in cold to warm climates. • Most are small in size but some can be 23m. • Most have an underground stem called a Rhizome that produces leaves called fronds and wiry roots. • Young fronds are tightly coiled and called fiddleheads.

  8. Fern Life Cycle • The life cycle of a fern is divided into two parts: sporophyte and gametophyte. • The gametophyte is a tiny plant that is green and flat and shaped like a heart. • The gametophyte produces male sperm cells and female eggs.

  9. Horsetails • Horsetails were more common millions of years ago, but few species survived. • They are small vascular plants that grow in wet places. • They have hollow stems made of silica. • Early Americans used to use them to scrub pots and pans

  10. Club Mosses • Club mosses are only about 25cm tall and grow in woodlands. • They are not like true mosses. • They have a vascular system.

  11. The Importance of Seedless Vascular Plants • Similar to the nonvascular plants, these plants help form soil and prevent erosion. • Ferns are used as houseplants and fiddleheads can be cooked and eaten. • Ancestors of these plants have formed coal that we use as a natural fossil fuel today.

More Related