MCQ
$DNA$ replicates semiconservatively, It was experimentally performed by.
- AErwin chargaff
- BWatson and crick
- ✓Meselson and frankin
- DHershey - chase
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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