Plants
Published on Nov 18, 2015
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PRESENTATION OUTLINE
Nonvascular plants
- Mosses are a type of nonvascular plants
- There are three major group of nonvascular plants
- These three types are mosses, liverworts, and hornworts
- These low growing plants live in moist areas were they can absorb water
Mosses
- With more than 10,000 species
- The are the most diverse group of nonvascular plants
- Thin root like structures called rhizoids anchor to the moss and absorb water and nutrients
Photo by _Harry Lime_
Liver worts
- There are more than 8000 species of liverworts
- They are often found growing as a thick crust on moist rocks or soil
- This group of plants is named for the shape of the plants leaf like gametophyte
- Liverworts have sporophytes that are too small to see
Hornworts
- There are fewer than 100 species of hornworts
- Hornworts are seldom found on rock or tree trunks
- Hornworts usually live in moist soil often mixed with grass plants
- Hornworts are named for the slender, curved structures that grow out of the gametophytes
Seedless vascular plants
- Ferns, club mosses, and horse tail have true vascular tissue, and they do not produce seeds
- Instead of seeds, these plants reproduce by releasing spores
- Unlike mosses, seedless vascular plants can grow tall because there vascular tissue
- provides an effective way to transport material
Ferns
- There are more than 12000 species of ferns alive today
- Like other vascular plants, ferns have true stems,roots, and leaves
- The stem of most ferns are under ground
- The roots anchor the fern to the ground and absorb water and nutrients from the soil
Horse tails
- There are very few species of horsetails on earth today
- Another name for horsetail is scouring rush
- Small leafs grow flat against the stem just above each joint
- The whorled pattern of growth somewhat resembles the appearance of a horses tail
Cub mosses
Club mosses have vascular tissue, and there are only a few hundred species left
Seed plants
They have vascular tissue, and they use pollen and seeds to reproduce
Vascular tissue
There are two types of vascular tissue phloem and xylem
Pollen and seeds
- Unlike seedless plants, seed plants can live in a wide variety of envirments
- Seed plants do not need water for sperm to swim to the eggs
- Seed plants produce pollen, tiny structures that contain the cells that -
- will later become sperm eggs
- A seed is a structure that contains a young plant inside a protective covering
Photo by Neal.
Seed structure
It is a seed that has three main parts-an embryo, stored food, and a seed coat
Photo by Neal.
Seed dispersal
After the seed have formed, they are usually scattered, sometimes far from where they where produced
Photo by Jason A. Samfield
Germination
After the seed is dispersed, it may remain inactive for a while before it germinates
Photo by VinothChandar
Roots
Roots anchor a plant in the ground, absorb water and minerals from the soil, and sometimes store food
Photo by premasagar
Stems
The stem carries substances between the plant's roots and leaves
Leaves
Leaves capture the sun's energy and carry out the food making process of photosynthesis
Gymnosperm
It is a seed plant that produces naked seeds
Examples of gymnosperm
Cycads, conifers, ginkgoes, and gametophytes are the only group that exist today
Angiosperms
First they produce flowers, and second they contrast to gymnosperms
Examples of angiosperm
A example of angiosperm is a flower
Monocot vs dicot
- Monocots are plants that use to eat
- Dicots are plants that are pretty or not used to eat
