What is a biome?
A region of the planet characterised by its climate and contains distinctive communities of plants and animals
A component of an ecosystem
A region of the planet where living organisms are found
The graph shows how the distribution of biomes is influenced by rainfall and temperature. Which biome experiences the greatest range of temperatures?
Boreal forest
Desert
Temperate deciduous forest
What is an ecosystem?
All the organisms and non-living components of an area
All the organisms of an area
All the non-living components of an area
What name is given to all organisms living in a particular area?
Community
Ecosystem
Population
Which of the following is an example of an abiotic factor?
Grazing
Predation
Temperature
Which of these pieces of equipment can be used to measure an abiotic factor?
Light meter
Pitfall trap
Quadrat
How can errors be minimised when using a moisture meter?
Use the probe several times in row
Wipe the probe between samples
Wave the probe around in the air between samples
How can the reliability of light meter readings be improved?
Take several readings
Take one reading and then another later in the day
Take one reading
Competition, disease, light availability and temperature are some factors associated with an ecosystem. Which factors are biotic?
Competition and disease
Disease and light availability
Light availability and temperature
Between which two organisms does competition occur?
Two organisms that are attempting to use different resources that are in short supply
Two organisms that are attempting to use the same resource that is in short supply
Two organisms that are attempting to use the same resource that is in limitless supply
For what do plants usually compete?
Light only
Light and soil nutrients only
Light, soil nutrients and carbon dioxide
Which piece of equipment can be used for estimating the number of plants in an area?
What piece of equipment is often used to sample the ground invertebrates in a habitat?
What is the most likely reason why grass grows abundantly in a field but not in a wood?
The woodland animals have eaten all the grass
The wood will be too sheltered from the wind
There is a higher light intensity in the field for photosynthesis
How can a representative sample of the plant species growing in a field be obtained?
By placing a quadrat at random at many different locations around the field
By placing many quadrats at random in one corner of the field
By placing a quadrat at random in one corner of the field
The diagram shows part of a food web on an oak tree. Which is the only population that is likely to increase if the greenfly were removed?
Spider
Hoverfly
Caterpillar