The human retina is composed of 10 layers. Beginning from back to the front of the retina, the layers include; an epithelium of retinal pigments, a layer of cones and rods, an outer regulating membrane, an outer nuclear layer, an outer plexform layer, an inner nuclear layer, an inner plexform layer, a layer of ganglion cells, a. layer of nerve fibre and an inner regulating membrane.
C) syphilis
rat bite fever is also caused by this bacteria
For Gradualism, changes in species is slow and gradual, occurring in small periodic changes in the gene pool, whereas for Punctuated Equilibrium, evolution occurs in spurts of relatively rapid change with long periods of non-change
