MCQ
The logistic population growth is expressed by the equation
- A$dt / dN = Nr (\frac{K-N}{K})$
- ✓$dN / dt = rN (\frac{K-N}{K})$
- C$dN / dt = rN$
- D$dN / dt = rN (\frac{N-K}{N})$
$dN / dt = rN (\frac{K-N}{K})$
Where, $N$ = population density at time $t$
$r$ = intrinsic rate of natural increase
$K$ = carrying capacity
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$I.$ An Association of two species where one is benefitted and other remains unaffected is called mutualism.
$II.$ An interspecific association where both partners derive benefit from each other is called commensalism.
$III.$ A direct food relation between two species of animals in which one animal kills and feeds on another is referred as predation.
$IV.$ A relationship between two species of organisms where both are partners are
benefitted from each other is called symbiosis