B2 Distribution of Organisms Flashcards
1
Q
Which 6 physical factors affect organisms?
A
Temperature. Availability of nutrients. Amount of light. Availability of water. Availability of water. Availability of carbon dioxide.
2
Q
What is a quadrat?
A
Square frames, used to mark off specific areas of ground.
3
Q
How big is a quadrat?
A
0.5m x 0.5m.
4
Q
Which two methods can be used to collect quantitative data on the distribution of organisms?
A
Random sampling using quadrat.
Sampling along a transect.
5
Q
How can you make sure you place the quadrats at random?
A
Use a calculator to generate random numbers.
6
Q
Why should a large sample size be used when sampling data?
A
To make results more valid.
7
Q
What can you look out for when you have sampled data?
A
Anomalous.
Find the mean.
Look for patterns/trends.
8
Q
What is another term for non-living factors?
A
Abiotic.
9
Q
What is another term for living factors?
A
Biotic.
