organisms in the environment
- Created by: jwizz
- Created on: 03-06-16 14:12
View mindmap
- Organisms in the environment
- Photo-synthesis
- carbon dioxide + water = glucose + oxygen
- glucose used in respiration or converted to insoluble starch and stored
- testing for starch
- waterproof cuticle keeps iodine out. green chlorophyll masks colour changes
- so boil it in ethanol to remove cuticle and colour
- add iodine
- turns black if starch detected
- waterproof cuticle keeps iodine out. green chlorophyll masks colour changes
- leaf adaptations
- large SA for light
- chlorophyll to absorb light
- air spaces for gas exchange by diffusion
- veins to transport
- limiting factors
- light
- stops photo-synthesis
- temperature
- because photo-synthesis is controlled by enzymes which denature
- Carbon Dioxide
- not much in the atmosphere
- higher at night coz photo can't use it up as it's dark
- light
- how plants use glucose
- during photo-synthesis
- use it to make amino acids
- sugars + nitrate ions + mineral ions
- made into proteins for use in cells
- broken down with oxyden to provide energy
- changed to starch for storage
- startch is insoluble in water
- plants can store starch in cells, it doesn't affect the water balance
- glucose is soluble in water
- if it was stored in cells, it would affect the way water moved in and out. it could affect the water balance of the whole plant
- glucose is soluble in water
- how plants use glucose
- during photo-synthesis
- use it to make amino acids
- sugars + nitrate ions + mineral ions
- made into proteins for use in cells
- broken down with oxyden to provide energy
- changed to starch for storage
- startch is insoluble in water
- plants can store starch in cells, it doesn't affect the water balance
- glucose is soluble in water
- if it was stored in cells, it would affect the way water moved in and out. it could affect the water balance of the whole plant
- glucose is soluble in water
- plants can store starch in cells, it doesn't affect the water balance
- provides an energy store for when it is dark
- tubers/bulbs
- startch is insoluble in water
- make complex carbohydrates like cellulose (for cell walls)
- combined with energy from respiration to build up fats and oils
- plants can store starch in cells, it doesn't affect the water balance
- provides an energy store for when it is dark
- tubers/bulbs
- startch is insoluble in water
- make complex carbohydrates like cellulose (for cell walls)
- combined with energy from respiration to build up fats and oils
- making the most of photo-synthesis
- more photo-synthesis = more biomass = bigger crops = more profit
- remove the limiting factors
- polytunnels
- hydroponics
- mix of mineral ions
- expensive but gives high profits from crops
- in areas with poor soil
- Carbon dioxide gernerators
- heaters
- lights at night
- organisms in their environment
- temperature
- affects photo-synthesis, so herivores can't survive long
- nutrients
- nitrate ions (venus don't need them)
- light
- affects plants
- affects breeding cycles
- water
- eg desert plants and animals are few
- Carbon Dioxide and Oxygen
- high oxygen neede for most fish and plants
- mosquitos - high co2 blood
- temperature
- measuring the distribution of organisms
- Quadrats
- quantatitive sampling
- random
- find mean and use to calculate it overall
- transect
- method
- Quadrats
- quantatitive sampling
- random
- find mean and use to calculate it overall
- Quadrats
- not random, regular intervals along a line
- also measure PH, light etc. at the same time
- method
- Quadrats
- how valid is data?
- reproducible
- valid data
- size of sample
- method
- control as many variables as possible
- Photo-synthesis
Comments
No comments have yet been made