Plants dominate the landscape and they play an integral role in all aspects of life on the planet. They influence the climate, provide nutrition and medicinal compounds, numerous bioproducts that are used in human and animal populations. They evolved about 500 million years ago from primitive algae. There are more than 300,000 species of plants present currently and most of them are phototrophs, which mean they can provide energy through photosynthesis. Many group of plants have adapted to the environment for extreme heat and cold conditions. There are seed plants, vascular plants, land plants and plants with complex leaves. For example, stometers are tiny opening across the backside of leaves and controls water leaving the cell. For plants living in hot condition, there is a water-proof lipid layer, a cuticle that prevents griness. Some plants may be woody plants have a more complex organic molecule called as lignin. It provides tissue support to the cell. Another adaptation seen only in vascular plants are the presence of xylem and flowing transport mechanisms. In plants, there is a fluctuation between the multicellular haploid plant structure called as the gamete fight, which is formed from the spore and give rise to haploid gametes. The spores are the diploid stage, the relationship between the spore fight and the gamete fight varies among different groups of plants. As plants evolve to higher level, the gamete fight generation has been reduced at a microscopic level. So simple algae have a more prominent gamete fight generation visible to the naked eye. Land plants are classified in two major groups according to the presence or absence of vascular tissue. Plants that lack vascular tissue are referred as non-vascular plants, examples, prior fights, liver wards, mosses and horn wards. Vascular plants include seedless and seed plants. Vascular tissue is composed of xylem that transports water and flowing that transports nutrients within the cell. Vascular plant has specialized cells that help to transport water and nutrients. Vascular plant has specialized cells that help transport water and nutrients. Vascular plant has been reduced at a microscopic level. The gamete fight state is more prominent, where sperm cells can reach the egg cell through water. water areas such as lakes and swamps. Liver words usually colonize the land and have shapes that resemble the lobes of the liver hence given the name, liver words. The horn work is a short blue queen gamutophyte that emerges from the sporophyte. Furns and whist ferns are characterized from large or leaves and branching roots. Mosses usually inhabit turnrass and tropical frost. It prevents soil erosion, store moisture and provide shelter to small animals. Hence, there is an example of a feathery moss. The seed bearing vascular plants are divided into major crops. Gymnospherms that have open seeds and angier swarms with closed seeds. The gymnospherms were the first plants to colonize the land and resemble the mord and day plants. Gymnospherms are naked seeds Gymnospherms are naked seeds diverse group of seed plants and the descent from a single common ancestor. They have separate female and male gametes pollinated by winds and insects. These include the conifers, which are the pine trees, the psycads, which also bear larger cones and can be pollinated by beetles. They also include the ginkgo tree, which has fan-shaped leaves very unique to seed plants. They do not have ovaries, however ovules that release ang are present in female cones. The angiospherms are the flowering plants. They form a beautiful landscape and are pollinated with birds, bees, bats and other animals. There are two main classes, monocots, such as lily and grassy plants and die-cuts, which are plants that have woody branches. Most flowering plants have a reduced gametified stage. The gametes are the pollen and eggs and are confined to the sexual part of the plants, which are the flowers. The flowers carry both male and female organ. The diagram shows the life cycle of a flowering plant where you can see the pollen greens and the embryo sac. They undergo double fertilization, a unique processed angiospherms. Double fertilization is a complex fertilization mechanism of flowering plants. The haploid sperm combines with the haploid egg to form a zycode. Another sperm fuses with two putter nuclei to form an endosperm, which provides nutrition to the zycode. In this chart, you can see the diversity of the angiospherms. Monocots have once more clotted leaves, such as corn seeds. Bean seeds can split into two parts, and are considered to be die-cut. Monocots are parallel leaves, such as tulips, corn and grass. Die-cuts on the other hand have branched leaves. Another difference between monocots and die-cuts are the number of flower parts. The endosperm is a very large number of flower parts. The endosperm is a very large number of flower parts. The endosperm is a very large number of flower parts. The endosperm is a very large number of flower parts. The endosperm is a very large number of flower parts. The endosperm is a very large number of flower parts.