gcse science biology unit B4
- Created by: charlie
- Created on: 16-05-13 16:56
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- B4
- biodiversity
- variation between individuals of same species
- no. diff. species in area
- no. of diff. habitats in area
- natural eco. higher B
- artificial- 1 type
- natural- variety
- transects
- investigate distribution
- tape measure and quadrat
- measure % cover
- plot on kite diagram
- measure % cover
- photosynthesis
- 6CO2+6H2O=C6H12O6+6O2
- light energy (CHLOROPHYLL)
- glucose converted into
- glucose for respiration
- lipids stored in seeds
- +nitrates=amino acids
- cellulose for cell walls
- insoluble starch for storage
- history
- greek scientists mass from min. in soil
- van helmont mass gained from water
- Priestley plant relit candle and kept animal alive longer - O2
- van helmont mass gained from water
- greek scientists mass from min. in soil
- O2 comes from water
- O-18 in water
- O-16 in CO2
- O-18 released
- O-16 in CO2
- O-18 in water
- 3 limiting factors
- not enough light
- too little CO2
- temp. has to be just right (45)
- pigments abosorb diff. wavelengths of light
- chlorophyll a
- chlorophyll b
- carotene
- xanthophyll
- day time
- photo+resp- release o2 take co2
- night time
- resp. release co2 take o2
- 6CO2+6H2O=C6H12O6+6O2
- estimating pop. size
- quadrat
- capture re-capture
- no. 1st sample x no. 2nd sample/ no. 2nd sample marked
- assumptions
- no changes in pop. size
- sampling methods identical
- marking hasnt affect survival
- assumptions
- no. 1st sample x no. 2nd sample/ no. 2nd sample marked
- diffusion
- net movement particles high concen. to low concen.
- perfume
- rate
- distance
- concen. diff.
- SA- bigger the faster
- net movement particles high concen. to low concen.
- ecosystem
- organisms and abiotic factors in area
- self supporting
- sun- energy source
- zonation
- change in dist. of species over habitat
- abiotic factors
- light
- salinity
- temp.
- osmosis
- water molecules partially perm mem. high concen to low concen
- trying to dilute
- moves into stronger solution
- type of diffusion
- plant cells
- inc. water- turgid
- dec. water- flaccid
- animal cells
- inc. water- lysis
- dec. water- crenation
- phloem and xylem
- x
- dead
- water+min. up
- transpiration system
- thick cellulose- support
- p
- food up and down
- alive
- translocation
- x
- plants need
- nitrates
- amino acids+proteins
- phosphates
- resp.+growth (DNA+cell mem.)
- potassium
- photo.+resp.
- magnesium
- makes chlorophyll
- root hairs
- take in min. by active transport
- nitrates
- decay
- microorganisms(decomposers)
- depend on
- temp.
- water amount
- O2 amount
- depend on
- detritivores
- breaks to smaller bits
- maggots
- saprophytes
- extracellular digestion
- fungi
- food peservation
- canning,cooling,freezing,drying,add salt sugar vinegar
- microorganisms(decomposers)
- leaves adapted for diffusion
- broad
- thin
- stomata
- open
- turgid guard cells
- close
- flaccid guard cells
- open
- guard cells
- air spaces
- transpiration
- benefits
- keep plant cool
- constant h2o for photo.
- turgid pressure
- mineral supply
- evap.+tran. inside leaves
- increased by
- light intensity
- temp
- air movement
- dec. humidity
- benefits
- farming
- intensive farming
- hydrophonics
- nutrient solution
- pesticides
- pollute rivers
- hydrophonics
- organic farming
- biological control
- weeding
- crop rotation
- intensive farming
- biodiversity
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