Organisms and their environment

Question 1

What are the physical factors?

Answer 1

temp

availability of nutrients

light

water

O2 and CO2

Question 2

What are the different methods for collecting quantitative data?

Answer 2

transects:

• line across a habitat
• number of organism is observed and recorded at regular intervals along the transect

quadrats:

• placed randomly so that a representative sample is taken
• validity and reproducibility increases from the more quadrats analysed

Question 3

Why do daisies not grow in the shade?

Answer 3

daisy plants need more light for photosynthesis, therefore daisies are found where there is plenty light