that characterize modern vascular plants. Explain how these characteristics have contributed to their success on land. a. Dominant sporophytes – As a result‚ the gametophyte became practically invisible to the human eye. b. Transport in xylem and phloem – These allowed plants to transport minerals‚ water‚ and other organic compounds‚ allowing plants to grow taller and thicker. c. Evolutions of roots – Roots are organs that provide better anchor for vascular plants for growing taller and enable them
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Open Ended Investigation aim To photograph six different organisms (not including humans)‚ classify them to the level of ‘family’‚ determine one characteristic that places them in each of their groups‚ and then use those organisms to construct a dichotomous key. Method Collecting Photographs of Organisms 1. Walk to a location with natural flora and fauna. (In this case I went to the Jim Ring Reserve) 2. Photograph at least two different species of ducks‚ and if possible‚ other birds which reside
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Cell Organelles Nucleus Its function is to control the cell’s activities and retain the chromosomes. The nucleus is bound by a double membrane‚ the nuclear envelope. The nuclear envelope has pores in it to allow the transport of mRNA. The cytoplasm like material is called nucleoplasm which contains chromatin (coils of DNA and histone proteins)‚ it is chromatin that condenses to form chromosomes during cell division. Within the nucleus is a small spherical body called the nucleolus which
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durum (durum wheat) to South Australia. Honours Thesis‚ The University of Adelaide. Brown P H and Hu H 1994 Boron uptake by sunflower‚ squash and cultured tobacco cells. Physiol. Plant. 91‚ 435–441. Brown P H and Hu H 1996 Phloem mobility of boron is species dependent: evidence for phloem mobility in sorbitol-rich species. Ann. Bot. 77‚ 497–505. Caceres L‚ Gruttner D. and Contreras N 1992 Water recycling in arid regions: Chilean case. Ambio 21‚ 138–144. Campbell T A‚ Rathjen A J and Jefferies S P 1994
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N10/4/BIOLO/HPM/ENG/TZ0/XX 88106001 Biology HigHer level PaPer 1 Tuesday 2 November 2010 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 8810-6001 17 pages © International Baccalaureate Organization 2010 – 2 – 1. N10/4/BIOLO/HPM/ENG/TZ0/XX [Question and image
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roots intake specific compounds from the soil‚ which are carried through the xylem to the leaves. There‚ they are used in the process of photosynthesis to create glucose as a source of energy. The glucose is carried throughout the plant through the phloem. Food/Energy Processing Food (meat‚ plants‚ etc) is eaten by the animal organisms‚ which chew the food to allow it to go through the esophagus.
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Botany online 1996-2004. No further update‚ only historical document of botanical science! Gibberellins In 1926 studied the Japanese E. KUROSAWA a rice disease that is known as the ‘foolish seedling’-disease in Japan. The plants grow extremely fast‚ look spindly and pale and break off easily. KUROSAWA detected that the reason for this abnormal growth is a substance that is secreted by a parasitic fungi (Fusarium moniliforme = Gibberella fujikuroi). It was termed gibberellin. During the thirties
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Experiment to Investigate Osmosis in Potatoes The aim of this experiment is to investigate the movement of water in and out of plant cells. The cells chosen for study will be taken from potato tubers. Firstly I will explain what osmosis is. Osmosis is the passage of water from a region of high water concentration through a semi permeable membrane to a region of low water concentration. This definition contains three important statements: a) It is the passage of water through a semi permeable membrane
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* Provides elasticity‚ flexibility‚ and rigidity to the plant body forming support. PERMANENT TISSUE C. Vascular Tissue C.1. Xylem Primarily functions for the transport of water and dissolved substances upward in the plant body. C.2. Phloem Primary functions in the transport of organic materials such as carbohydrates and amino acids. ANIMAL TISSUES Animal Tissues Developed from the primary germ layers of the embryo: Ectoderm Mesoderm Endoderm There are 4 types of
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b) Mitochondria and nucleus c) Cell wall and cell membrane d) Cell cycle and mitosis e) Cell cycle and cancer f) Tissue and organ system g) Digestive system‚ circulatory system‚ and respiratory system h) Root system and shoot system i) Phloem and xylem vessel 2. On a separate piece of paper‚ draw a labeled diagram of an animal cell. Identify at least 6 organelles in your diagram. 3. Identify which stage of mitosis each of the following cells is going through. Describe what is happening
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