: Plant are any number of the plant kingdom,with about 260,000known species of mosses, liver work, ferns, harbeceous and woody plants, bushes,vines, trees, and other forms that mantle the Earth and are also found in itswaters. Plants increase in size from small.
Though the first plants appeared onland only about a half a billion years ago, today they account for by far thelargest proportion of the earths biomass. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-* Copyright DueNow. com Inc. *Category:MiscellaneousPaper Title:plantsText:WHAT PLANTS AREPlant are any number of the plant kingdom,with about 260,000 known species ofmosses, liver work, ferns, harbeceous and woody plants, bushes, vines, trees,and other forms that mantle the Earth and are also found in its waters.
Plantsincrease in size from small. Though the first plants appeared on land only abouta half a billion years ago, today they account for by far the largest proportionof the earths biomass. Only a small amount of percentage of percentage of plant species are directlyused by humans for food, shelter, fiber, and drugs. The head of the list arerice, wheat, corn, cotton, conifers, and tobacco.
on which alot of people dependon. DIFFERENT KINDS OF PLANTSScientist know that there are more than 250,000 different kinds of plants. Ifwe went around the world we would see alot of different kinds of plants. Thereare four different important groups of plants the group in which in which thesimplest plants are found includes one-celled bacteria, and fungi that are likethe molds that are often found seen growing on bread and cheese. In this samegroup are probably the longest which are called seaweed.
These are calledthallophytes. Another group of relatively simple plants includes the mosses and livewortsthat are found in forest, on rocks and leaves, but they have no roots. They arecalled bryophytes. A third group of plants includes the ferns, quillworts , andclubmosses. They are periodphytes.
Most of the plants we know belong to the group ofplants are called spermatophytes, or seed-bearing plants. That includes likegrass, vegetables, trees, shrubs, flowers and alot more. WHAT PLANTS NEED TO GROWPlants need their roots, leaves, and their stems. That’s what they need togrow straight and healthy. They also need their sunlight but others need little.
Some need water and nutrients, others need moisture with minerals. Plants make their own food by sucking up all the water and traveling it upthrough the stem to the flower. Leaves make their own food under themselves. But the most plants depend on isthe sun. ROOTSThe roots purpose is to hold up the plant up and to absorb the water andminerals. Roots are found underground and grow down.
They have no stems or leavesattached. The epidermis is just behind the growing tip of the root that is covered withroot hairs, which are the growth of the epidermal cells. The root hairs push outthe dirt around it and suck up the water and nutrients. Roots need xylem and plhoem, although many are highly modified to carry outdifferent kinds of functions. The roots are the most important food organs. Epiphytes have roots made for absorbing rain water that flows down the back ofthe plants.
LEAVESThe leaf is the organ of most plants. Leaves are the organs sticking out ofthe stem. They are made up of loosely arranged cells with air, were cells absorbcarbondioxed and goes in in and then they release oxygen. The mesophyllis held together bay the upper and lower surface of the leaf,which is covered by tissue. A vascular runs through the mesophyll providing thecells walls with water and taking out the food the produces of photosynthesis toother parts otf the plants.
The leaf blade is connected to the stem through athin portion called the petiole, or stalk, which consist mostly of flowers -carpels.The individual parts and sepals are all modified leaves that have taken onreproductive functions.-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-