Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
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
|
