Evolution

I never really accepted the theory that evolution is a random process, rather than a response to environment. A plant responds to its environment by turning its leaves towards the light. This isn't a random thing (you don't see random fluctuations in the way the leaves are facing), it's a direct response to the light source.
Isn't it likely that a species indulges in the same response to environment, only over a longer timeframe? Generational mutation as a means of maximising survival in the current environment. Primal cellular conciousness adapting to changing conditions rather than a haphazard random walk...