The factor that is most likely to have a density-independent influence on population growth is Extreme weather conditions.
Density-independent factors such as weather and climate, exert their influences on population size regardless of the population's density. Conversely, the effects of density-dependent factors intensify as the population increases in size.
The squirrels are attuned in their brains to understand that owls are a threat because it is a predator. This is visual stimuli that evolved over many years to elicit a conditioned response. This is an innate behavior (meaning that it has been pre-programmed into an animal's genes) and offspring are naturally born with it.
Answer:
Osteoblasts. is the answer