This lesson describes the role of abscisic acid in the closure of stomata during times of water stress, including the role of calcium ions. The PowerPoint and accompanying resources have been planned to cover the content of point (4) of topic 14.2 of the CIE A-level biology specification (for assessment in 2025-27).
The lesson begins with an introduction of water stress and the description of the need for plants to adapt to these conditions because they can’t flee like animals can. A step-by-step guide underpins the lesson, consisting of 8 key steps in the mechanism. A series of tasks run alongside this, supporting the students with their understanding of key substances, such as abscisic acid, calcium ions, and potassium ions. There are multiple understanding checks, with answers embedded into the PowerPoint, to allow students to assess their own progress. There are also prior knowledge checks which encourage students to make links to previously covered content, including the response to a low blood glucose, and also the role of ions in living organisms.
This lesson has been specifically designed to follow the lesson on guard cells and stomata, which is also uploaded.
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Topics 14.2 & 15.2: Homeostasis and control and coordination in plants (CIE A-level biology))
It's fair to say that the plant-based topics are not every students' favourite, so the lessons in this bundle are full of engaging activities and knowledge checks to maintain motivation whilst ensuring that the A-level details are understood. These 5 lessons cover the plant sections of topics 14 and 15 of the CIE A-level biology specification (for assessment in 2025 - 27) and complement each other by building on knowledge attained in the previous lesson.
£10.00
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Homeostasis in plants (Topic 14.2 CIE A-level bio)
This bundle covers the content of the 4 specification points in topic 14.2 of the CIE A-level biology specification, titled "Homeostasis in plants". The 4 specification points concern the structure and function of guard cells as well as the role of abscisic acid and calcium ions in a plant's response to water stress. The plant biology topics can be poorly understood by students, so both lessons have been filled with understanding checks so students can constantly assess their progress and address any knowledge gaps that arise.
£5.00
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Topic 14: Homeostasis (CIE A-level biology)
This bundle of 9 lessons describes homeostasis in mammals and plants, explaining the content using real-world examples including osmoregulation and the control of blood glucose and the opening and closing of the stomatal apertures. The lessons have been planned at length and are filled with a wide variety of tasks which will engage and motivate the students whilst checking on their understanding of the following points from topic 14 of the CIE A-level biology specification (for assessment in 2025-27): 14.1: 1 - 10 14.2: 1 - 4 (ALL) The quality of the lessons can be experienced through the download of the osmoregulation lesson as this has been shared for free.
£18.50
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