Why has Bitesize changed?
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The distribution of organisms in a habitat may be affected by physical factors, such as temperature and light. Transects and quadrats are used to collect quantitative data.
What term is used for the number of organisms of a species in a habitat?
What is a habitat?
What is an environment?
A 0.25 m2 quadrat was placed in a 100 m2 field. Five daisy plants were counted under the quadrat. What is the estimated number of daisies in the field?
Why should a quadrat be placed randomly?
During some fieldwork, 6 voles were trapped, marked and released. Three days later, 25 voles were trapped. 3 of these had marks. What was the approximate population of voles?
Which device is most suited to catching small vertebrates such as mice?
What is a transect?
Which of these is an example of an abiotic factor?
What is meant by biodiversity?