1. Identify the structure 'A' in this diagram.   Optic Papilla   Optic Chiasma   Optic Nerve   Retina   Hint Half-n-half Clue   2. Identify iris in this diagram.   A   B   C   D   Hint       3. _______ apparatus is a part of the internal ear and is responsible for maintenance of equilibrium and posture.   Tympanic   Cochlea   Ear Drum   Vestibular   Hint       4. Identify the ear ossicle B in this diagram.   Stapes   Malleus   Incus   Half-n-half Clue   5. True or false: The end organs (receptors) of smell are known as olfactory neurons.   True   False   Hint       6. Identify the ear ossicle "A" in this diagram.   Malleus   Incus   Stapes   Hint       7. True or false: Choroid is the layer of the eye situated in between retina and sclera.   True   False