pptx, 4.99 MB
pptx, 4.99 MB
docx, 109.25 KB
docx, 109.25 KB
docx, 26.66 KB
docx, 26.66 KB
docx, 15.42 KB
docx, 15.42 KB
docx, 18.67 KB
docx, 18.67 KB
docx, 15.17 KB
docx, 15.17 KB

This fully-resourced lesson describes how the structure of the xylem tissue allows water to be transported in the stem and leaves. Written for AQA A-level Biology, the engaging and detailed PowerPoint and the accompanying worksheets cover the 1st part of specification point 3.4.2 (mass transport in plants) and includes a detailed description of the cohesion-tension theory.

The first part of the lesson focuses on the relationship between the structure and function of the xylem tissue. A number of quiz competitions have been included in the lesson to maintain engagement and to introduce key terms. The 1st round does just that and results in the introduction of lignin which leads into the explanation of how the impregnation of this substance in the cell walls result in the death and subsequent decay of the cell structures. Students are encouraged to discuss how the formation of this hollow tube enables the transport of water to be effective. Moving forwards, other structures such as the bordered pits are introduced and an understanding of their function is tested later in the lesson. The remainder of the lesson focuses on the transport of water in the stem and leaves by root pressure and the transpiration pull, which includes cohesion, tension and adhesion. The lesson has been designed to make links to information covered earlier in the lesson as well to topics from earlier in the specification such as cell structures and biological molecules

Due to the extensiveness of this lesson, it is estimated that it will take in excess of 2/3 A-level teaching hours to cover the detail included in this lesson.

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Topic 3: Organisms exchange substances with their environment (AQA A-level Biology)

This lesson bundle contains 17 detailed and fully-resourced lessons which cover the following specification points in topic 3 of the AQA A-level Biology specification: Topic 3.1 * The relationship between the size of an organism or structure and its surface area to volume ratio * The development of systems in larger organisms as adaptations that facilitate exchange as this ratio reduces Topic 3.2 * Adaptations of gas exchange surfaces as shown by gas exchange in single-celled organisms, insects, bony fish and the leaves of dicotyledonous plants * The gross structure of the human gas exchange system * The essential features of the alveolar epithelium as a surface over which gas exchange takes place * The mechanism of breathing to include the role of the diaphragm and the intercostal muscles Topic 3.3 * During digestion, large molecules are hydrolysed to smaller molecules * Digestion in mammals by amylases, disaccharidases, lipase, endopeptidases, exopeptidases and dipeptidases * Mechanisms for the absorption of the products of digestion by cells lining the ileum of mammals Topic 3.4.1 * The structure and role of haemoglobin in the loading, transport and unloading of oxygen * The effects of carbon dioxide concentration on the dissociation of oxyhaemoglobin * The general pattern of blood circulation in a mammal * The gross structure of the human heart * Pressure and volume changes and valve movements during the cardiac cycle * The structure of the arteries, arterioles and veins * The formation of tissue fluid and its return to the circulatory system Topic 3.4.2 * Xylem as the tissue that transports water * The cohesion-tension theory of water transport * Phloem as the tissue that transports organic substances in plants * The mass flow hypothesis for the mechanism of translocation in plants If you would like to sample the quality of the lessons included in this bundle, then download the following lessons which have been uploaded for free Alveolar epithelium Absorption in the ileum Arteries, arterioles and veins Formation of tissue fluid Translocation

£22.00
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Mass transport (AQA A-level Biology)

This fully-resourced bundle includes 10 detailed PowerPoint lessons and their accompanying worksheets which cover the content as set out in topic 3.4 (Mass transport) of the AQA A-level Biology specification. This topic includes sections on mass transport in animals (3.4.1) and mass transport in plants (3.4.2). The lessons have been designed to include a wide range of tasks to maintain motivation whilst ensuring that the understanding of the content is constantly checked and links are made to other topics. The specification points in topic 3.4 which are covered in these lessons are: * The haemoglobins * The role of haemoglobin in the transport of oxygen * The oxyhaemoglobin dissociation curve * The Bohr effect * The general pattern of blood circulation in a mammal * The gross structure of the human heart * The valve movements in the cardiac cycle * The structure of the blood vessels * The formation of tissue fluid * The transport of water in the xylem * The structure of the phloem tissue * Translocation by mass flow If you would like to see the quality of these lessons, download the arteries, tissue fluid and translocation lessons as these have been uploaded for free

£10.00
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Mass transport in plants (AQA A-level Biology)

All 3 of the lessons that are included in this bundle are detailed and fully-resourced with differentiated worksheets to cover the content of topic 3.4.2 (Mass transport in plants) as set out in the AQA A-level Biology specification. Some students do not fully engage with this topic and therefore time has been taken to design each lesson so that it maintains motivation through a wide range of tasks. These tasks include quiz competitions which introduce key terms in a memorable way. The specification points that are covered in these three lessons are: * Xylem as the tissue that transports water in the stem and leaves of a plant * The cohesion-tension theory of water transport in the xylem * Phloem as the tissue that transports organic substances in plants * The mass flow hypothesis for the mechanism of translocation in plants If you would like to see the quality of these lessons, download the translocation lesson as this has been shared for free.

£4.00

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