Populations

Question 1

Habitat

Answer 1

The place where a community of organisms lives.

Question 2

Population

Answer 2

A group of interbreeding organisms of one species in a habitat.

Question 3

Community

Answer 3

All the populations of different organisms living and interacting in a particular place at the same time.

Question 4

Ecosystem

Answer 4

Made up of all the interacting biotic and abiotic features in a specific area.

Question 5

Ecological niche

Answer 5

How an organism fits into the environment- where it lives and what it does there.

Question 6

Ecology

Answer 6

The study of inter-relationships between organisms and their environment.

Question 7

Investigating populations using quadrats

Answer 7

• Set out two tape measures at right angles to form axes
• Use a random numbers table to generate two numbers which will act as coordinates
• Place the quadrat at the given coordinates
• Find the mean number of species per quadrat
• Multiply by the size of the area being sampled.

Question 8

What to consider when using quadrats

Answer 8

• The size of the quadrat
• The number of sample quadrats to record within the study area
• The position of each quadrat within the study area

Question 9

Transects

Answer 9

A line through an area to be studied to identify changes to the area

Question 10

Line transect

Answer 10

A tape measure is placed along the transect and species that touch the tape measure are recorded.

Question 11

Belt transect

Answer 11

Quadrants are placed next to each other along the transect to work out species frequency and percentage cover along a transect.