good for its domestic environment. As higher transportation rates could be an indicator of a more wet climate. And lower rate of transportation could be used to conserve water in hotter climates. 5. Describe the pathway of water movement from xylem cells in the stem to the air surrounding the leaf. 6. What is the role of the roots and root hairs in transpiration? 7. With intense sunlight‚ drought‚ and intense wind a plant’s guard cells may lose turgor pressure and its stoma may close
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| | |2 |(a) |During the favourable season more secondary xylem cells are formed and they are larger with thin|(3) | | | |wall (1) / larger lumen. | | | | |In the unfavourable season‚ less secondary xylem cells are formed and they are smaller with | | | | |thick wall (1) / smaller lumen.
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dependent embryos Byrophytes (moss) - form from ground-hugging carpets; at most only a few cells thick *absence of vascular tissue‚ cannot support tall plant growth Sporophytes – seedless vascular plants Vascular plants: Two types of vascular tissue: 1. Xylem (conducts water and minerals; includes dead cells called tracheids) 2. Phloem (distributes sugars‚ amino acids‚ other organic products; consists of living cells) Leaves: Microphylls- leaves w/single veins Megaphylls- leaves w/ highly branched vascular
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tissues in the margins of leaves. There are three levels of transport in plants: uptake and release of water and solutes by individual cells‚ short distance cell to cell transport at tissue and organ levels‚ and long distance transport of sap by xylem and phloem at the whole plant level. The transport of water is controlled by water potential. Water will always move from an area of high water potential to an area with low water potential. This water potential is affected by pressure‚ gravity‚ and
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ANSWERS Cambridge IGCSE® Biology Practice Book Answers 1 Characteristics of living things 1 Characteristic respiration an increase in size‚ mass and complexity of an organism excretion producing offspring‚ which prevents extinction of the species sensitivity this involves feeding – obtaining nutrients for growth‚ energy and maintaining health reproduction in response to changes‚ e.g. presence of a predator‚ to find food or a mate growth the ability
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Transpiration Formal Lab Report By Jessica Tran Introduction When water is transported from the roots to the mesophyll cells in the leaves‚ it is evaporates out the stomates‚ called transpiration‚ to create a lower osmotic potential. Osmotic potential is the part of the water potential of a tissue that results from the presence of solute particles. Even though the stomates open to release water‚ it also brings in carbon dioxide to produce sugar and oxygen through a process of photosynthesis
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Home Biology on 14th October‚ 2010 Anonymous 0 what is the process of transpiration in vascular plants? vascular plants 3 Answers FollowEdit 3 Answers ‚ Sorted by Points | Newest first | Oldest first on 29th July‚ 2011 William Cyrus 12.1k Karma 1 Transpiration is the procedure by which plants acquire nutrients in the air and lose their own moisture in the process. The leaf tissues is important for this process. Edit on
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The primary xylem and primary phloem tissues are pushed inward into the] pith and outwards respectively by the continuous production of secondary tissues cut I off by the cambium ring. The primary xylem is gradually pushed inward and is found at the centre of the axis; whereas‚ the primary phloem‚ being soft in nature‚ gets completely crushed. These activities in the stelar region exert a great pressure outwardly. The cortex cells‚ the pericycle and the epidermis divide anticlinally to cope
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Temperature on the Xylem of Tomato Plants Question: How does temperature affect the Xylem in Tomato Plants? Introduction: Throughout this experiment I will be testing the size of the Xylem in Roma tomato plants when exposed to different temperatures. I will be placing six Roma Tomatoes in six different area which will each be in different temperatures. After three weeks of constantly watering the tomato plants with blue dyed water I will cut the plant from the root and examine the Xylem under a microscope
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Compare and contrast xylem tissue and phloem tissue‚ including their respective structures and functions. The stems and roots of plants contain two separate transport systems; xylem vessels and phloem tubes‚ of which neither transport oxygen as it is transported to cells by diffusion. The network of xylem vessels transports water and mineral ions from the roots to all other parts of the plant whereas phloem tubes transport food made in the leaves to all other parts of the plant. In the stems
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