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19 Cards in this Set

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What is biodiversity?
Many different species of plants and animals which coexist in the same environment
What is the definition of a habitat?
Where an organism lives
What is the definition of a community?
The total number of all the different organisms living in a habitat at any one time
What is the definition of a population?
The number of the same species living in a habitat at any one time
What is the area of a quadrat?
0.25m^2
What must you make sure you do when sampling?
Take a big enough sample and sample randomly
Describe the 'Capture-Recapture' technique
- organism captured
- organism marked
- organism released back
- second sample taken
- the unmarked organisms are counted and marked
What are some limitations with the 'Capture-Recapture' technique?
- must assume no organisms have died or immigrated
- the marking could affect their survival rates
What is zonation?
The gradual change in the distribution of species across a habitat
What is a transect line?
Quadrats laid along a measuring line and the number of species are counted in the quadrats. This can help create a kite diagram
What is the balanced symbol equation for photosynthesis? (opposite of respiration)
6CO2 + 6H20 ---> C6H1206 + 602
What is the Glucose from photosynthesis used for?
energy (respiration)
growth and repair
cell walls (glucose converted to cellulose)
How is Glucose able to be stored?
It must be converted to starch as this is insoluble
How can photosynthesis be increased?
increasing temperature
increasing Carbon Dioxide concentration
Increasing the light intensity
When do plants respire?
All the time
When do plants photosynthesise?
Only during the day
Why is the upper epidermis transparent?
To allow sunlight through to the palisade layer
Why are the cells in the palisade layer packed with chloroplasts?
So that they can absorb the maximum amount of light
Why does the spongy mesophyll contain lots of air spaces?
to allow optimum gaseous exchange