3.2 Distribution of Organisms

Organise these factors into the correct categories

Groups:

(a) Biotic

,

(b) Abiotic

• Temperature

• Disease

• Competition

• Predation

• Moisture

• Light intensity

• pH

• Grazing

Abiotic factors are commonly known as being a​ ​ (a)   factor, whereas biotic factors are known as being a​ ​ (b)   factor.

• non-living
• living

What does the term biodiversity mean?

• The place an organism lives.

• The role an organism plays.

• All the living and non-living factors in an area.

• The variety of living things in an area.

What is the purpose of repeating when sampling species?

• To ensure that the investigation is valid.

• To ensure that the investigation is controlled.

• To ensure that the investigation is accurate.

• To ensure that the investigation is reliable.

Organise these options into the correct categories

Groups:

(a) Quadrats

,

(b) Pitfall Traps

,

(c) Soil Temperature

,

(d) Soil Moisture

• Clean probe between readings.

• Sampling plant species.

• Sampling invertebrates.

• Randomly place it in an area.

• Thermometer

• Keep in the soil until calibrated.

• Do not leave too long.

• Ensure there is lid/shelter for it.

Quadrats that are placed at intervals at different points across a line is called a _________ line.

Place these options into the right categories.

Groups:

(a) High biodiversity

,

(b) Low biodiversity

• Low grazing

• High grazing

• Moderate grazing

What is the name of a species that is present or absent in relation to envrionmental quality?

Which plant species would have the following description:

A single, serrated leaf with no lobes or prickles.

• Elm

• Beech

• Sycamore

• Oak

Which of the following statements are best used to describe a rowan leaf?

• Has prickles

• Leaf has lobes

• Lobes are rounded

• Several leaflets