distribution of organisms

Question 1

why do organisms live in different places?

Answer 1

variation of environment

Question 2

whats a habitat

Answer 2

place where an organism lives

Question 3

what environmental factors affect where an organism is found(5)

Answer 3

• temp
• availability of water
• availability of oxygen and co2
• availability of nutrients
• amount of light

Question 4

two ways to study distribution of organism?

Answer 4

quadrats and transects

Question 5

How do you use a quadrat (5)

Answer 5

1) place it on the ground at a random point in FIRST sample area
2) count all organisms within the quadrat
3) repeat as many times as planned
4) work out mean
5) complete all in the second sample area

Question 6

How do you work out the population size

Answer 6

Find mean number of organisms per m2

Then multiply total area of habitat

Question 7

How do you use a transect

Answer 7

1) mark out a line using a tape measure

2) collect data along the line(counting how many organisms on the line)

Question 8

What do you need to think about when collecting environmental data

Answer 8

• Make sure it’s repeatable and reproducible

- control variables