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29 Cards in this Set
- Front
- Back
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Name three ways photosynthesis helps animals
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Produces food
Removes carbon dioxide Produces oxygen |
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Label parts A-H
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A-Upper Epidermis
B-Spongy Mesophyll Cell C-Guard Cell D-Stoma/stomata E-Lower Epidermis F-Vascular Bundle G-Palisade Mesophyll Cell H-Waxy Cuticle |
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What is the significance of a large surface area on a leaf?
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Exposure to as much sunlight and air as possible
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Why is it important that a leaf is thin?
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Sunlight penetrates for quick diffusion of CO2 and O2
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Why are stomata important?
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To let carbon dioxide in and oxygen out
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Why are there no chloroplasts in the upper/lower epidermis?
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Sunlight can penetrate mesophyll layer
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Why are palisade cells arranged end on end?
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As few cells walls as possible between sun and chloroplasts
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Why are there xylem vessels close to every mesophyll cell?
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Supplies water to chloroplasts for photosynthesis
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Why are there phloem vessels close to every mesophyll cell?
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It takes away the products of photosynthesis as sucrose
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Name four uses of glucose
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Respiration
Converted to starch Makes cellulose for cell walls Proteins and DNA |
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Why is starch a good storage molecule?
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Large-wont diffuse, wont dissolve
Less reactive Compact-wont affect osmosis |
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What colour does hydrogen carbonate solution go in...
High conc of co2 CO2 in norm air Low conc of CO2 |
High-yellow
Normal-orange Low-Purple |
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How are mineral ions transported in a plant?
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In the xylem
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Name a use for nitrates and a deficiency symptom in plants
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Making amino acids and DNA
Stunted growth=old yellow leaves |
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Name a use for phosphate and a deficiency symptom in plants
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Part of cell membrane and DNA
Root growth=young purple leaves |
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Name a use for potassium and a deficiency symptom in plants
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Helps enzymes that carry out Photosynthesis and Resp.
Yellow leaves and dead spots |
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Name a use for magnesium and a deficiency symptom in plants
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Part of chlorophyll molecule
Leaves yellow |
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At a high light intensity, photosynthesis is at a ..... rate than respiration
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HIGHER
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At a high light intensity, surplus ..... is produced
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Oxygen because more carbon dioxide is taken in
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At a low light intensity, photosynthesis is at a .... rate than respiration
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LOWER
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At low light intensity, surplus ..... is produced
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Carbon dioxide because more oxygen is used in respiration
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What is a limiting factor?
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A component of reaction in shortest supply, preventing rate from increasing
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What happens when you increase the limiting factor?
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The rate of reaction increases
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Name three factors affecting the rate of photosynthesis
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Light intensity
Carbon dioxide conc. Temperature |
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What happens when a very bright light hits a plant
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The UV rays damage the plant
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How do you increase the levels of carbon dioxide? (without using complicated equipment)
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Greenhouse
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A 10 degree rise in temperature has what effect on the rate of photosynthesis?
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Double rate
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Why does the rate of photosynthesis slow and then stop about 40 degrees?
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The enzymes responsible are denatured and cannot bind with the substrate anymore.
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Why is there a maximum rate of photosynthesis?
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Only limited amount of chloroplasts
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