How do oxygen and carbon dioxide move in and out of leaves
the stomatal pores
3 of 31
How do plants take in water
through the roots
4 of 31
What is the by-product made in photo syntheses which is needed by animals
oxygen
5 of 31
How does water supply affect the rate of photo syntheses
too little makes photo syntheses slow down
6 of 31
Describe how light levels affect the rate of photosyntheses
The more light, the faster photosyntheses is
7 of 31
What is the optimum temperature for photosyntheses
around 30C
8 of 31
How does burning paraffin in a greenhouse help plants photosynthesise
The CO2 levels increase
9 of 31
What does a plant convert glucose into so it can store it
starch
10 of 31
How would you get rid of all the starch from a plant's leaves
deprive the leaf of either light, water, carbon dioxide or chlorophyll
11 of 31
What do you use to test a plant leaf for starch
iodine
12 of 31
What two features of root hairs make them well designed for absorbing nutrients
thin call membrane and the large surface areas on the root hairs
13 of 31
What are the three essential minerals needed by plants to keep them healthy
nitrates, phosphates, potassium
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What are nitrates needed for
provides nitrogen which is needed for making proteins
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What are phosphates used for
phosphates provide phosphorus needed for photosynthesis and respiration
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What is potassium used for
potassium helps agents like enzymes to work properly. These enzymes are needed for photosyntheses and respiration
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What would happen if you didn't have nitrogen
A small plant with yellow older leaves
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What would happen if you didn't have phosphorus
Poor root growth and purple younger leaves
19 of 31
What would happen if you didn't have potassium
Yellow leaves with dead bits
20 of 31
What parts are in the plants stamen
the anther and the filament
21 of 31
What parts are in a plants carpels
stigma, style and ovary
22 of 31
Why do some plants have brightly coloured petals
because of insect pollination
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What is the difference between self pollination and cross pollination
self pollination= pollen is transfered from stigma on the same plant. cross pollination= pollen is transferred from the stamen of one plant to the stigma of another plant.
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