What is retinitis pigmentosa?

Macular degeneration is an eye disease that causes loss in the center of the field of vision. In this disease, the cone cells are the photoreceptor cells most affected. Therefore, this is a disorder involving the A) Retina B) Choroid layer C) Ciliary body D) Cornea

81. A 74-year-old man has the sudden onset of weakness in the left upper and lower extremities. His tongue is weak and deviates to the right when protruded. The plantar reflex is extensor on the left. Which of the following is the most likely site of a lesion? A) Genu of the internal capsule B) Medulla C) Midbrain D) Pons E) Posterior limb of the internal capsule

Is S cerevisiae healthy?