"The strategy"? "Investing"?
Well, which is it? Is variation directed or is it undirected, or is the above just another 'unfortunate' and inconsistent lapse into teleological double-talk? Call me a monkey's uncle, but If new variation arising from recombination and mutation is accidental and adaptively random in direction then I should like to know exactly what the genetic mechanism is that has the foresight to strategically direct mutations to invest in novel adaptive requirements.
Cordially,
1) Our hands are very similar to other primate hands and are formed that way for grasping tree limbs. When we hit the ground running (so to speak) those same hands were now great for manipulating the environment and making tools and wielding weapons.
2) We humans have a genetically-endowed ability to deal with ambient radiation. At tis point, it does not matter; but if and when ambient radiation increases to where it might kill 20% of the most vulnerable population, it comes into play though the variation was silent before the increase.