Plant Physiology

• Leaf structure and stomatal density – leaf cross-section and a nail-varnish leaf cast Biology · Plant Physiology Three screens on the leaf as the organ of photosynthesis: a leaf cross-section with cuticle, epidermis, palisade and... Ages 16–17
• Transport in plants – root uptake, xylem and phloem Biology · Plant Physiology Follow water from the soil into root hair cells, across the cortex and endodermis to the xylem, and up to the leaves... Ages 16–17
• Plant anatomy – T.S. of dicot and monocot roots and stems Biology · Plant Physiology A virtual practical: cut thin transverse sections of sunflower and maize stems and roots, stain them with safranin,... Ages 16–17
• Morphology of Flowering Plants: Roots, Stems and Leaves Biology · Plant Physiology Explore real flowering plants drawn as labelled diagrams: tap and fibrous roots and their modifications (storage,... Ages 11–12
• Respirometer – oxygen uptake of germinating seeds Biology · Plant Physiology Three respirometer tubes in a water bath: germinating seeds, dry seeds plus glass beads, and glass beads only... Ages 16–17
• Plant growth hormones and insect metamorphosis Biology · Plant Physiology In plant mode, treat a seedling with a hormone at a concentration you drag along the scale: at low concentrations... Ages 16–17
• Plant groups and alternation of generations – life-cycle wheel Biology · Plant Physiology Compare algae, mosses, ferns, conifers and flowering plants by vascular tissue, roots, seeds, flowers and fruit on... Ages 16–17
• Light-dependent reactions and the Calvin cycle – electron transport, ATP synthase, RuBP/GP/TP and the ¹⁴C tracer experiment Biology · Plant Physiology A thylakoid membrane with photosystems II and I, photolysis of water, an electron transport chain that pumps H⁺ into... Ages 16–17
• Hill Reaction Practical – DCPIP and Isolated Chloroplasts Biology · Plant Physiology Blend leaves in cold isolation medium, filter and centrifuge to get chloroplasts, then add blue DCPIP and read the... Ages 16–17
• Absorption and action spectra of photosynthesis – pigments, Engelmann's experiment and chromatography Biology · Plant Physiology Four screens on photosynthetic pigments: shine light of single wavelengths from 400 to 700 nm at equal photon flux... Ages 16–17
• C3, C4 and CAM Photosynthesis and Photorespiration Biology · Plant Physiology Compare the net photosynthesis of wheat (C3) and maize (C4) as you change light, CO₂ and temperature, and watch... Ages 16–17
• Photosynthesis rate – light, CO₂, temperature and the compensation point Biology · Plant Physiology A sprig of pondweed under a lamp releases O₂ bubbles faster or slower with light intensity, CO₂ concentration and... Ages 16–17
• Photosynthesis practicals – starch test on leaves and hydrogencarbonate indicator Biology · Plant Physiology Two virtual practicals on photosynthesis and gas exchange. Destarch a plant for 48 h in the dark, light variegated... Ages 12–13
• Transpiration and stomatal control Biology · Plant Physiology Adjust light, air humidity, wind and soil moisture, then watch the stomata open or close, the transpiration rate... Ages 16–17
• Flowering plant reproduction lab – dissection, pollination, dispersal and germination Biology · Plant Physiology A virtual lab on reproduction in flowering plants. Dissect an insect-pollinated flower, a wind-pollinated flower or... Ages 16–17
• Hydroponic vegetables – mineral nutrition and the law of the minimum Biology · Plant Physiology Mix a nutrient solution for hydroponic vegetables by adjusting N, P, K concentrations and pH. The plant shows the... Ages 16–17

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