This lesson describes the role of plant hormones in stomatal closure, leaf loss in deciduous plants and seed germination. The extensive and detailed PowerPoint and accompanying resources have been planned to cover the content of point b of module 5.1.5 of the OCR A-level biology A specification.
The start of the lesson challenges the students to identify three leaf cells in the list of 11 leaf structures. This introduces guard cells and then the opening between them, the stomatal aperture. Time is taken to go through the process by which the apertures are opened to allow carbon dioxide to diffuse into the leaf for photosynthesis. This provides students with an insight into the movement of potassium ions and water when they are challenged about the closure of these openings in response to water stress. Students will meet abscisic acid and understand how this acts as the first messenger, before calcium ions act as the second messenger to trigger events on the inside of the guard cells.
Moving forwards, the role of ethene and auxins in leaf loss and gibberellins in seed germination are described and explained. Multiple opportunities are taken to challenge students on their prior knowledge as well as their current understanding and all answers are embedded into the PowerPoint.
This lesson is extensive and it is estimated that it will take 2-3 hours of teaching time to go through all of the tasks and content.
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A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.
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Module 5.1.5: Plant and animal responses (OCR A-level Biology A)
All 11 lessons included in this bundle are detailed and contain a wide variety of tasks to challenge and engage the students whilst covering this potentially difficult topic. The content of this module, titled plant and animal responses, is regularly assessed in the PAPER 1 and 3 OCR examinations, so these lessons have been filled with assessment-style questions to continually expose the students to this type of material. The following specification points are covered by this bundle: 5.1.5 a, b, d, g, h, i, k, and l. If you would like to sample the quality of the lessons before committing to the bundle, then why not download the role of plant hormones, organisation of the nervous system and sliding filament theory lessons, as these have been shared for free?
£18.00
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Plant responses (OCR A-level biology A)
This mini-bundle covers key content in the plant half of module 5.1.5, which is titled "Plant and animal responses". The students knowledge and understanding of the plant topics tends to be weaker than that of the animals, so these 3 lessons have to be planned at length to break the content down into smaller chunks and there are multiple opportunities for understanding to be checked. If you would like to sample the quality of these lessons and the time that has been put into their design, then why not download the "role of plant hormones" lesson as this has been shared for free.
£6.40
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