B2.4

Question 1

What are 5 physical factors that may affect the distribution of organisms?

Answer 1

~ Temperature
~ Nutrients 
~ Amount of light 
~ Availability of water
~ Availability of oxygen and carbon dioxide

Question 2

How are quadrats used to collect data?

Answer 2

~ They are placed randomly on the ground

~ Everything inside is counted

Question 3

How can you estimate the number of organisms in an area using a quadrat?

Answer 3

Multiple the number of organisms in the 1msquared quadrant by the number of square metres in the area

Question 4

How are line transects used?

Answer 4

~ The line is stretched between two points
~ Metre intervals are marked along the line
~ The type of plant observed at each metre is recorded

Question 5

Why should a large sample size be used when sampling data?

Answer 5

To get more accurate data

Question 6

What is another term for non-living factors?

Answer 6

Abiotic

Question 7

What is another term for living factors?

Answer 7

Biotic

Question 8

What is meant by the environment?

Answer 8

All the conditions that surround a living organism

Question 9

What is meant by community?

Answer 9

All the populations of different organisms that live together in a habitat

Question 10

What is an ecosystem?

Answer 10

A community and the habitat in which it lives

Question 11

What is meant by population?

Answer 11

All the members of a single species that live in a habitat

Question 12

How can quantitive data on the distribution of organisms be obtained?

Answer 12

~ Random sampling with quadrants

~ Sampling along a transect