Neural networks, because even the most basic functions require circuits of neurons rather than just a single neuron.
In the 9th century, it was suggested that when organisms change, they are adapting to survive.
Lamarck, was the researcher that created the theory of acquired characteristics.
Malthus first proposed the idea that overpopulation <span>contributed to the lack of resources and interfered with survival, but he applied this to only humans, Darwin was the first to apply this to all organisms.</span>
<span>These are symptoms of rickets. Rickets is a disease that results from the deficiency of vitamin D. This is when there is imperfect calcification, softening, and distortion of the bones. In order to treat this vitamin D or calcium might be added to a diet.</span>
I believe the correct answer is the presence of harmful bacteria.