B2a: Distribution Of Organisms Flashcards
0
Q
What affects where an organism is found?
A
Temperature Availability of water Availability of oxygen and CO2 Availability if nutrients Amount of light
1
Q
What is meant by ‘distribution’ of organisms?
A
Where an organism is found
2
Q
How to study the distribution of organism?
A
Measure how common an organism is in two sample areas (quadrats) & compare
Study how the distribution changes across an area
3
Q
How to work out the population size
A
Mean number of organisms/sqm x total area
4
Q
How to make results more accurate
A
Large sample size, more representative
Use random samples, make it reproducable
5
Q
How to make results more valid
A
Must be reliable
Control variables
