So, really, lichens are effectively photosynthetic in the same sense plants are. But are a composite organism composed of a fungus (nonphotosynthetic) and cyanobacteria (photosynthetic), instead of a single organism.n fungi we can find mushrooms, toadstools, yeasts, molds and more. â¦ According to the newest classification, fungi are eukaryotic (genetic material surrounded by a membrane, i.e nucleus), haploid (only one set of cromosomes) or diploid (two sets of cromosomes) that make zygotic meiosis.
A tough white covering called the sclera protects the eye. Part of the white sclera can be seen in the front of the eye. A clear, delicate membrane called the conjunctiva covers the sclera. At the front of the eye is the cornea. The cornea is the clear part of the eyeâs protective covering. It allows light to enter the eye. The iris is the colored part of the eye that contracts and expands so the pupil can let just the right amount of light into the eye. The light is directed by the pupil to the lens. The lens focuses the light onto the retina (lining the back of the eye).
Overview / Basic structure of the eyeball. The eyeball consists of three principal layers. 1  The outer layer, or sclera, consists of dense fibrous connective tissue. 2  The sclera is white of the eye. 3  The sclera is continuous with the transparent substantia propria of the cornea. The exposed front surface of the eye, including the cornea, is also covered by a thin, non-keratinized stratified squamous epithelium. 2  The next layer, or choroid, consists of heavily pigmented loose connective tissue, including many melanocytes. 3  The choroid is normally not visible behind the white of the sclera.