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Secondary Science : Bio: Plants - Physiology

Clip description		Keywords
	Abscission – Why do plants shed their leaves in autumn? Duration: 02:09 Chris Packham explains why and how deciduous trees drop their leaves every autumn.	tree, plant, leaf, photosynthesis, abscission, autumn, seasons

	Autumn colours Duration: 01:04 Tree foliage changes colour in the autumn.	autumn, deciduous, leaf, leaves, forest, fall

	Cells, tissues and organs in plants Duration: 01:51 Specialised cells in plants are organised into tissues, organs and systems.	cell, tissue, organ, system, palisade, root hair, chloroplast, cell organisation

	Components of a plant cell Duration: 01:23 The presenters build a plant cell and describe the role of each component.	cell, plant, cytoplasm, membrane, nucleus, cell wall, cellulose, chloroplast, chlorophyll, vacuole

	Leaf structure and the absorption of carbon dioxide Duration: 01:00 Leaves have stomata through which they absorb carbon dioxide.	carbon dioxide, photosynthesis, leaf, stomata, plants, physiology, botany

	Nitrogen-fixing leguminous plants Duration: 01:02 The role of nitrogen-fixing leguminous plants in soil improvement is examined and crop rotation is briefly discussed.	population, fertilisers, nutrients, legumes, bacteria, nitrogen, soil, chemistry, bitesize

	Plant adaptations - extreme cold Duration: 04:08 How is plant life adapted to survive in freezing Arctic temperatures? A limited number of species including algae and lichens are able to survive all year round.	Darwin, plants, algae, cold, Arctic, adaptation, climate, Attenborough, Ellesmere, island, water, nutrients, heat, light, lichen, mustard, rock, willow, poppy, sun

	Plant adaptations - extreme heat Duration: 2:02 How can the Eucalyptus tree flourish in the heat of Australia? Eucalyptus leaves are poisonous and can be eaten only by Koala bears.	Darwin, desert, heat, plant, adaptation, eucalyptus, koala, food, predator, toxin, tannin, faeces, energy, leaves, brain, sleep, rainforest, species

	Plant adaptations - high altitude Duration: 05:42 How do plants survive at high altitude? Temperature and other climate conditions change rapidly and plants have specific adaptations to survive.	Darwin, plants, adaptation, high altitude, mountain, climate, Alps, meadow, snowbell, cold, wind, sun, photosynthesis, Lobelia, hair

	Sachs and the discovery of the chloroplast Duration: 03:41 The advent of modern microscopy enable Sachs and others to see inside leaf cells and see chloroplasts and the way they behave. The formation of starch grains is also demonstrated with high magnification images.	chloroplast, starch, photosynthesis, plants, botany

	The binomial system of classification Duration: 04:54 Carl Linnaeus developed the binomial system of naming plants. This form of classification become the international standard.	classification, Carl Linaeus, botany, plants, binomial, systematics, genus, species, genus

	The cell membrane Duration: 01:05 The process of diffusion is explained with reference to a cell membrane.	plant cell, membrane, diffusion, nutrients, pore, permeable

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Secondary Science : Bio: Plants - Physiology

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