Biology for IGCSE & O level - Variation And Selection (Section 6 - No. 30)
In the context of natural selection, what is meant by 'fitness'?
An organism's ability to lift heavy weights.
An organism's overall health.
An organism's reproductive success.
An organism's speed and agility.
Vysvětlení
Fitness is measured in terms of reproductive success: how many offspring an organism produces.