1 markWhich of the following is a correct example of a population?
All the animals in a forest.
All the goldfish in a pond.
All the species of animals in Europe.
All the people born in Scotland over a 150-year period.
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1 markWhich of the following is an example of a community?
All the populations of all species in a forest.
All the goldfish in a pond.
All the wheat and corn in a field.
All the plants in a forest.
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1 markThe graph below shows the growth of the human population globally since 1630.
Which of the following options represents the longest time period taken for the population of humans to double?
100 years
200 years
300 years
400 years
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1 markThe graphs below show how the number of carnivores change over a period of time in a habitat.
At point X the herbivores in the habitat are removed.
Which graph correctly shows the effect of this on the number of carnivores?
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1 markA scientist grew some bacterial cells in ideal growth conditions.
Each bacterial cell can reproduce itself once in a 30 minute period.
For an initial population of 10 bacterial cells, how many cells will be present in the population after 8 hours of cell reproduction? You can assume that 10% of the bacterial cells die in the final few minutes before the end of the growth period.
655 360 cells
589 824 cells
144 cells
65 536 cells
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