2031490
Description
Mind Map by Tom Johnson, updated more than 1 year ago
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Created by Tom Johnson
about 9 years ago
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Biology: Plants
- Photosynthesis
- CO2 + H2O = C6H12O6 + O2
- Sunlight would be where the equals sign is,
and provides energy for the whole process
- CO2 diffuses into the leaf from the air
- Water is absorbed from the ground by the xylem
- Water is absorbed from the ground by the xylem
- Sunlight would be where the equals sign is,
and provides energy for the whole process
- Photosynthesis occurs inside chloroplasts in the leaves of a plant
- The chloroplasts are filled with chlorophyll
which is actually where photosynthesis occurs
- The chloroplasts are filled with chlorophyll
which is actually where photosynthesis occurs
- Rate of photosynthesis is affected by light intensity, CO2
volume and temperature. Amount of water available can
also affect the rate but this is often a limiting factor
- Limiting factors are things that prevent
photosynthesis happening any faster
- At night, the limiting factor is light
- In the winter, the limiting
factor is temperature
- At night, the limiting factor is light
- For example, you can continue increasing light intensity,
however the rate will stop increasing at a certain point because
then the temperature or CO2 volume needs to increase too
- Limiting factors are things that prevent
photosynthesis happening any faster
- CO2 + H2O = C6H12O6 + O2
- Water is taken through the plant
from the ground by the xylem
- The phloem is responsible for "translocation", the movement of
food and nutrients to all tissues and organs throughout the plant
- The phloem is responsible for "translocation", the movement of
food and nutrients to all tissues and organs throughout the plant
- Plants use glucose for multiple purposes
- Respiration
- Respiration releases energy which allows the plant to
convert the rest of the glucose into other useful substances
- Respiration releases energy which allows the plant to
convert the rest of the glucose into other useful substances
- Making Cell Walls
- Here glucose is converted into cellulose
which is used to make strong cell walls
- Here glucose is converted into cellulose
which is used to make strong cell walls
- Making Proteins
- Glucose is combined with nitrate ions to make
amino acids which are then made into proteins
- Glucose is combined with nitrate ions to make
amino acids which are then made into proteins
- To be stored in seeds
- Here glucose is turned into "lipids"
(fats and oils) to be stored in seeds
- Here glucose is turned into "lipids"
(fats and oils) to be stored in seeds
- To be stored as starch
- Starch is stored in the roots, stem, leaves and seeds as a glucose
reserve for when photosynthesis isn't happening (eg. the winter)
- Starch is stored in the roots, stem, leaves and seeds as a glucose
reserve for when photosynthesis isn't happening (eg. the winter)
- Respiration
- Guard cells are adapted to open and close the
"stomata" (pores) in a leaf. Their function is gas
exchange and controlling water loss in a leaf.
- When the plants has lots of water, the guard
cells go turgid which open the stomata so
gases can be exchanged for photosynthesis
- When the plant is lacking water, the guard cells become flaccid which causes
the stomata to close which prevents too much water vapour from evaporating
- Guard cells are sensitive to light and close the stomata at
night to save water without losing out on photosynthesis
- Guard cells are sensitive to light and close the stomata at
night to save water without losing out on photosynthesis
- When the plant is lacking water, the guard cells become flaccid which causes
the stomata to close which prevents too much water vapour from evaporating
- When the plants has lots of water, the guard
cells go turgid which open the stomata so
gases can be exchanged for photosynthesis
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