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Organisms and Populations — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations3 Marks
Question
Study the population growth curve given below and answer the questions that follow:
  1. Identify ‘A’ and ‘B’ shown in the graph.
  2. When and why do such curves occur in a population?
✓

Answer

  1. ‘A’ - Exponential.
‘B’ - Logistic.
  1. ‘A’- Exponential growth - when resources (food and space) are not limiting/ when resources in the habitat are unlimited, each species has the ability to realise its full potential to grow in number in absence of checks.
‘B’ - Logistic growth - When resources become limiting/ competition between individuals for limited resources occurs, the fittest individuals will survive and reproduce.

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