ESAT (Engineering and Science Admissions Test) · Biology

Ecosystems

6 practice questions, each with the answer and an explanation.

Practise Ecosystems now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 6 questions

A sample contains three species with $10$ , $6$ and $4$ individuals ( $N = 20$ ). Using Simpson's index $D = 1 - \frac{\sum n ( n - 1 )}{N ( N - 1 )}$ , what is $D$ to $2$ decimal places?
Which organisms are typically the pioneer species in primary succession on bare rock?
Which sequence correctly describes eutrophication of a lake after fertiliser runs in?
Producers in a grassland fix $25000 kJ m^{- 2} yr^{- 1}$ of energy. The primary consumers store $2000 kJ m^{- 2} yr^{- 1}$ . What is the percentage efficiency of energy transf…
In a mark-release-recapture study, $40$ animals are marked and released. A later sample of $50$ animals contains $10$ marked animals. What is the estimated population size?
In the nitrogen cycle, which process converts ammonium ions in the soil into nitrate ions?

Keep practising

More ESAT (Engineering and Science Admissions Test) topics

All ESAT (Engineering and Science Admissions Test) practice →

Ready for the full ESAT (Engineering and Science Admissions Test) test?

Take a mock test ESAT (Engineering and Science Admissions Test) hub

Ecosystems practice questions | GetMyMockTest