Understanding Ecosystems and Succession

What is formed when populations of different species come together?

• An ecosystem

• A community

• A habitat

• A niche

What do a community and the non-living components of its environment together form?

• A niche

• A habitat

• An ecosystem

• A population

What term describes the role a species occupies within a habitat?

• Community

• Ecosystem

• Niche

• Population

What is the carrying capacity of an ecosystem?

• The maximum number of species it can support

• The maximum size of a population it can support

• The minimum number of species it can support

• The minimum size of a population it can support

Which of the following is NOT a factor that can cause variation in population size?

• Abiotic factors

• Interspecific competition

• Predation

• Genetic mutation

Which method is used to estimate the population size of slow-moving or non-motile organisms?

• Mark-release-recapture

• Randomly placed quadrats

• Radio tracking

• Satellite imaging

What is the mark-release-recapture method used for?

• Estimating the population size of non-motile organisms

• Estimating the population size of motile organisms

• Measuring abiotic factors

• Studying plant succession

What is primary succession?

• The process of species extinction

• The process of colonisation by pioneer species to climax community

• The process of genetic mutation

• The process of interspecific competition

Which of the following is an example of an abiotic factor?

• Predation

• Temperature

• Interspecific competition

• Parasitism

What is the primary assumption made when using the mark-release-recapture method?

• The population size is decreasing

• The marked individuals mix randomly with the population

• The population is closed with no immigration or emigration

• The marked individuals are more likely to be recaptured