words short essay on Plants. Plants as living things, exhibit the seven life processes-nutrition, respiration, excretion, sensitivity, movement, reproduction and growth. A few other Photosynthesis is the process that transforms organisms from light energy into chemical energy. In order for photosynthesis to take place, it needs these three things: Water, carbon dioxide, 20/09/ · Essay on Plants in words for kids. Plants are very useful for us. They give us food, medicines, gum, and wood. A plant has roots, stems, branches, and leaves. The roots
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In this essay, an attempt has been made to present briefly about plants. After reading this essay you will learn about: 1. Introduction to Plants 2. Do Plants Breathe? Chemical Composition 4. Elements Essential for Healthy Growth 5. Different Organs 6. Uses 7. Characteristics 8. Factors Affecting Plant essay 9. Nomenclature Groups Water Absorption Importance of Water Ecological Classification and Others. Plant essay 1. Plants are the plant essay workers of our planet, they want to live and also help others animals including human beings to live. They have well-developed metabolic system, which includes both anabolism synthesis and catabolism breakdown. On the other hand, animals have only catabolic system.
Anabolic system, like photosynthesis, is present in most of the plants and catabolic system, like respiration, is present in all plants. Photosynthesis is dependent on light, but the respiration occurs both day and night plant essay their life period. Photosynthesis requires CO 2water, chlorophyll and light. Plants plant essay absorb CO 2 from the atmosphere and also utilize the CO 2 produced from its own respiration. Water is being absorbed by plants from the soil. Chlorophyll absorbs light mainly from the sun like an antenna of a T. The resultant product is plant essay carbohydrate mainly glucose and O 2 is released in the atmosphere as by-product.
This O 2 is utilised by both plants and animals. The above fact indicates that the rate of O 2 production in plant is much more than that of respiration. Thus, the produced O 2 becomes available to animals in plant essay amount. The product of photosynthesis — the carbohydrates is being utilised by the plants during respiration and the excess food is being stored in different organs. We snatch the food and other products from their storehouse, plant essay. On the other hand, during respiration the O 2 is being used up and CO 2 released, plant essay.
The CO 2 level in the atmosphere is being increased day by day, mainly due to three reasons:. Rapid destruction of forest by natural fire or artificial destruction of forests to get more agricultural land and also for urbanisation. Combustion on a large scale of plant essay and fossil fuels, such as coal, natural gas and mineral oil etc. Plant essay the number of population of plant gradually reduce by natural hazards or artificial destruction by human beingsthe amount of CO 2 will also gradually increase CO 2 plays the most vital role in trapping the heat radiated from the earth to cause global warming due to greenhouse effect.
Besides CO 2the principal greenhouse gases are water vapour, methane, nitrous oxide, tropospheric ozone, chlorofluoro- carbons and halons. Due to green-house effect, the temperature of the earth is gradually increasing which eventually will cause more melting of ice-caps and glaciers of the polar regions of the earth Greenland, Antarcticathe floating ice on the water of the seas may also melt partially. These will cause expansion of the volume of sea water, plant essay, as a result the sea water level may rise, plant essay. The rise of sea water level may cause the reduction of our agricultural and living area due to flood.
So plants are very essential for the sustainability of animals, including human beings, to get O 2 for respiration, for reducing the amount of CO 2 from the atmosphere, plant essay, for food, medicine, social functions etc. So, throughout history, men showed their keen interest to study the plant as a whole. Essay 2. Plants require oxygen for respiration and release carbon plant essay. For this gaseous exchange, they unlike animals, have no specialised organs. It occurs by diffusion through stomata, lenticels and epiblema cells. Each part of plant takes care of its own gas exchange needs. There is little transport of gases from one part to another. Plants do not require much demand for gas exchange. All plant plant essay respire at rates far lower than animals.
Leaves are well adapted to take care of their own needs of gases during plant essay. Moreover, leaves also utilize oxygen released during photosynthesis. In plants, plant essay, cells are closely packed and located quite close to the surface of the plant. Thus the distance that gases must diffuse is not large. In stems, the living cells are present beneath the bark and are in contact with air through lenticels. Loose parenchyma cells in leaves, stem and roots provide interconnecting network of air spaces for quick gas exchange. Essay 3. Plant body is made of material units, cells. Each cell has protoplasm usually surrounded by a rigid wall. Protoplasm undergoes metabolic changes and produces many ergastic substances.
As plants cannot take solid food, they manufacture complex organic matters out of simple substances. We know that the whole plant essay kingdom, including human beings, has to depend on plants for the supply of plant essay. Chemically, protoplasm is a very complex matter having proteids, carbohydrates, plant essay, fats, and other inorganic substances in composition. Proteids are made of carbon, hydrogen, oxygen, nitrogen, and in addition, often sulphur and phosphorus; carbohydrates and fats are composed of carbon, hydrogen and oxygen. Cell wall is primarily made of insoluble carbohydrate, plant essay, cellulose. An idea about the chemical composition of the plant body can be had by the following method.
A plant is dried at a high temperature, plant essay. Naturally it will lose water. The proportion of water can be determined by proper weighing. The dried plant gets charred forming a black mass of charcoal, plant essay. That is mainly carbon which forms almost half the dry weight of the plant. Now it is burnt. The combustible matters like proteins, carbohydrates and fats are converted into carbon dioxide, sulphur dioxide, ammonia, water vapour, and other gases and thus plant essay, which may be properly collected and composition noted. The white incombustible residue left behind is ash, which is nothing but the oxides of the metals constituting the plant body. The percentage of ash varies; but on the average, it forms nearly 5 per cent, plant essay, of the total weight of the plant.
On proper analysis ash is found to be composed of quite a large number of elements, many of them, of course, being present only in minute traces. The following elements are, however, always present in ash: potassium Kcalcium Camagnesium Mgiron Fesodium Nasulphur Sphosphorus Pchlorine CIand silicon Si. Elements like manganese Mnboron Bzinc Zn plant essay, copper Cuand molybdenum Mo may be present in slight traces. Essay 4. Elements Essential for Healthy Growth of a P lant: It is found that thirteen elements are constantly present in the plant body, as revealed by ash analysis. The mere presence in the composition does not necessarily mean that they are all essential for the growth and nutrition of plants. What elements are essential and what are not, can be determined by water-culture experiment, plant essay.
As plants absorb most of the elements from soil, a standard solution is prepared with those plant essay, and plants are grown there. By conducting a series of experiments to be discussed presently it has been found that ten elements are very important for the nutrition of plants and the remaining three, referred to as non-essential elements, are not directly concerned with nutrition. It has been found that minute traces of the elements like boron, zinc, copper, manganese, plant essay, and molybdenum are equally necessary for the normal development of plant essay plants, plant essay. Thus essential elements plant essay put into two groups. That the above elements are essential for the healthy growth of a plant can be proved by water-culture experiment Fig.
It is undoubtedly a laborious one. A few wide mouthed jars are taken, thoroughly washed and rinsed in nitric acid. Seeds are germinated on sterilised saw dust. A few healthy seedlings of more or less same size are selected for experiment. Jars are labelled as 1, plant essay, 2, 3, 4 and so on. The first jar 1 is filled with plant essay culture solution, i. a solution with all the elements essential for growth of plants. Culture solution should not be alkaline. Culture solutions of various compositions are used.
Jar No. A bent glass tube is put for aeration of roots and the jar is covered by black paper to plant essay off light, plant essay. Now a series of jars are similarly filled with plants but one element, plant essay, in turn, is eliminated from the solution poured in every jar; thus jar 2 has plant essay potassium salt, jar 3, no calcium salt and so on.
Essay on plants - short paragraph on plant in English
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Photosynthesis is the process that transforms organisms from light energy into chemical energy. In order for photosynthesis to take place, it needs these three things: Water, carbon dioxide, Plants have the unique ability of producing their own food through a process called photosynthesis. In this process, plants are able to produce macromolecules such as words short essay on Plants. Plants as living things, exhibit the seven life processes-nutrition, respiration, excretion, sensitivity, movement, reproduction and growth. A few other
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