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31 Cards in this Set
- Front
- Back
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What does a chloroplast do?
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Traps sunlight for photosynthesis
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What does the stomata do?
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Allows gases to diffuse in and out of the leaves
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What do the guard cells do?
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Control the opening and closing of the stomata
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What are palisade cells?
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Cells in the leaf that contain lots of chloroplasts for photosynthesis
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What is osmosis?
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Movement of water from an area of high water concentration to an area of low water concentration across a partially permeable membrane
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What does turgid mean?
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Cell has lots of water and the vacuole pushes out against cell wall
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What does flaccid mean?
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Cell has limited water so the plant wilts
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What does plasmolysed mean?
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Serious lack of water so the cell membrane pulls away from the cell wall
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What is transpiration?
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The loss of water from the plant
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What is photosynthesis?
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The process where plants make glucose using sunlight
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What does the root hair cell do?
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Increases the surface area of the root to make it absorb water and minerals faster
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What affects the rate of transpiration?
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Light, temperature, humidity and wind
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What are roots used for?
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Taking in water and minerals
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What are the leaves used for?
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Taking in sunlight for photosynthesis
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What is transported in the phloem tubes?
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Food
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What is transported in the xylem tubes?
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Water
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What minerals are needed for healthy growth?
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Nitrates, Phosphates and potassium
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What is a fertiliser used for?
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Adding nitrates, phosphates and potassium to the soil
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What does a pyramid of numbers show?
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How many of each organism is in the food chain.
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What does a pyramid of biomass show?
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How much living material is at each stage of the food chain.
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What is intensive farming?
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Growing the most food possible in an area using chemicals
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What is organic farming?
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Growing food without using chemicals
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What is biological control?
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Using natural predators to eat pests
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What do insecticides do?
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Kill insects
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What do herbicides do?
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Kill weeds
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What do fungicides do?
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Kill fungi
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What conditions speed up decay?
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Warmth, lots of oxygen, moist, lots of bacteria
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What makes things decay?
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Bacteria
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How can we prevent decay?
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Canning; cooling; freezing; adding salt; adding vinegar
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What processes make carbon dioxide?
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Burning, respiration, decay
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What process removes carbon dioxide from the air?
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Photosynthesis
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