biology flowering plants

May 20th, 2015
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A plant has three parts. These are leaves, stem and roots. The leaves make food for the plant through photosynthesis and take it down to the roots through the stem. The stem also carries water and mineral salts from the ground to the leaves.

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Biology Assignment: Endangered SpeciesName:Muhamad Firdaus Bin HasnanClass:4 IotaBiology Teacher:Pn. Hajah Roziah binti Abu Bakar9.1 Human Activities that Endanger an EcosystemHUMAN ACTIVITIE THAT THREATEN THE ECOSYSTEM.1. An increase in demand for shelter, food, transport and raw materials due to the increasing world population brings about negative effect on the ecosystem.2. Conflicts arise between fulfilling human needs and the end protect the ecosystem.THE IMPACT OF HUMAN ACTIVITIES ON THE ECOSYSTEM.DEFORESTATION1. The extensive removal of trees from forests is known as deforestation2. Vast areas of forests are cleared for agriculture, development and logging activities.3. The importance of forests involve:Regulating world climateFunctioning as habitat of various flora and faunaHousing plants which produce food and pharmaceutical productsRegulating the amount of Carbon Dioxide and oxygen through photosynthesisServing as water catchment area4. Deforestation causes:Soil erosionLandslidesFlashfloodsLoss of biodiversityGreenhouse effectGlobal warmingClimatic changes(a) Soil erosion, flash floods and landslidesWhen it rains for a long period of time during rainy seasons, the top layer of soil loosens and slides down causing landslidesLandslides may cause the loss of lives and propertiesThe stability of soil is lost due to deforestationClearing of trees causes the loss of tree leaves to protect the soil from th

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