MCQ
When in a population birth rate and death rate exactly balance each other, it is called as:
- APlateau phase
- BAcceleration phase
- CExponential phase
- DInitial growth
✓
Answer
- Plateau phase
Explanation:
The sigmoid graph shows that the population growth of a species has three phases which are - the exponential phase, the transitional phase and the plateau phase. In the plateau phase, the population size is constant, so no more growth is occurring. This is the result of natality rate being equal to mortality rate and is caused by resources becoming scarce as well as an increase in predators, diseases and parasites.
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