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$I.$ Population evolve to maximise their reproductive fitness, also called Darwinian reproductive fitness (higher $r$ value), in the habitat in which they live
$II.$ The population growth rate $r$ is inversely related to generation time
$III.$ The housefly, which has a short life span and produces a large number of eggs, could be considered as a ' $K$ ' selected species
$IV.$ Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategies
$V.$ Life history traits of organisms have evolved in relation to the constraints imposed by biotic and abiotic factors in their habitat Select the combination of correct statements
$I, II$ and $III$
$I, III$ and $IV$
$I, III$ and $IV$
All except $III$
Solution
The housefly which has a short life span and produces a large number of eggs could be considered as ' $r$ ' selected species
Depend upon the giving birth their are two type of species
${ }^{\prime} r^{\prime}$ selected speciesorganism of this type give more young ones during their life cycle. Parent care their children less and their size are also little
' $K$ 'Selected Species Organisms of this kind gives less birth during their life cycle. They care more their children. Their size and life span are more than $r$ selected species, $e.g.,$ man, mammal, bird, etc.
