B2.4.1 Distribution of organisms Flashcards
1
Q
Which six physical factors affect organisms?
A
Temperature Availability of nutrients Amount of light Availability of water Availability of oxygen Availability of carbon dioxide
2
Q
What is a quadrat?
A
These are square frames, used to mark off specific areas of ground usually 0.5m X 0.5m
3
Q
Which two methods can be used to collect quantitative data on the distribution of organisms?
A
Random sampling using quadrats and sampling along a transect
4
Q
How can you make sure you place the quadrats at random?
A
Use a calculator to generate random numbers.
5
Q
Why should a large sample size be used when sampling data?
A
To make the results more valid (you can calculate a mean, identify anomalous results, look for patterns, etc)
6
Q
What is another term for non-living factors?
A
Abiotic
7
Q
What is another term for living factors?
A
Biotic
