Population Dynamics
Biology ⇒ Ecology and Environment
Population Dynamics starts at 8 and continues till grade 12.
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See sample questions for grade 11
A population of 1000 birds has 200 births and 100 deaths in a year. What is the net population change?
A population of 500 fish has a birth rate of 0.1 and a death rate of 0.05 per year. What is the net growth rate?
A population of deer is limited by the amount of food available. Is this an example of a density-dependent or density-independent factor?
A population of insects doubles every month. If there are 100 insects now, how many will there be after 3 months?
A population of rabbits increases from 200 to 300 in one year. What is the growth rate per year?
A population pyramid with a wide base and narrow top indicates what about the population?
Describe how predation can regulate population size.
Describe one way in which human activities can affect population dynamics.
Describe the difference between density-dependent and density-independent factors affecting population size.
Describe the impact of invasive species on native population dynamics.
Explain the concept of 'age structure' in a population.
Explain the difference between natality and mortality in population studies.
Explain what is meant by the term 'population crash'.
Explain why populations cannot grow exponentially forever.
Explain why small populations are more vulnerable to extinction.
In a mark-recapture study, 50 animals are marked and released. Later, 100 animals are captured, 10 of which are marked. Estimate the population size.
List three methods used to estimate population size in the field.
The logistic growth equation is dN/dt = rN(1 - N/K). What does K represent?
A population of 2,000 individuals has a per capita birth rate of 0.04 and a per capita death rate of 0.03 per year. Calculate the expected population size after one year, assuming no migration.
A population of bacteria in a laboratory culture starts with 1,000 individuals. The population doubles every 4 hours. How many bacteria will be present after 24 hours, assuming no deaths occur?
