A phenotype is the physical appearance of a characteristic.
A genotype is the code for that characteristic.
<span>Aplysia is a marine gastropod mollusc which is an often used model organism in neuroscience, especially on the cellular biology of learning and memory. What makes them easy to work with are their giant neurons, which are one of the largest. Aplysia neurons are suitable for studies of how neurons and neural circuits control behaviours. Its defensive reflex has been studied because it is mediated by electrical synapses, which allow several neurons to fire synchronously.</span>
It gets blurry and further away because it is not changing
Because the world rotates around and God the creator changed up the earth that's the biblical answer but a scientific answer would be due to himans