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WorksheetsMeasuring the size and distribution of populations of organisms | Exit Quiz | Oak National Academy
Total questions: 6
Worksheet time: 4mins
What means to give an approximate value, for example, when sampling the population of fish in a lake?
(a)
What is the image an example of?
a pyramid of numbers
a pyramid of biomass
a classification key
a food web
The image shows a sample of organisms found from a pond. Why has the net been emptied into a white tray which contains water?
The white tray helps the organisms to see each other.
It helps you to be able to identify organisms as the white makes them stand out.
The water makes sure that they stay alive after being caught.
The white tray helps to create an environment that is similar to the habitat.
When carrying out a mark-release-recapture experiment what do you need to remember to do?
Mark the organisms with something that is harmful.
Mark the organisms with a bright mark so you can see them.
Mark the organisms with a mark that means the organism doesn't stand out.
Capture more organisms as soon as marked individuals are released.
100 beetles were caught and marked in a mark-release-recapture experiment. Two days later in a second catch 80 beetles were caught. 40 of these were marked. What is the population of beetles?
2
20
200
2000
30 woodlice were caught and marked in a mark-release-recapture experiment. Two days later in a second, 15 woodlice were caught. 5 of these were marked. What is the population of woodlice?
300
45
90
145
