Why can't I see endoplasmic reticulum?

Why won't Xenon combine with Oxygen to form a covalent compound? Is the NGST a tool for optical or non-optical astronomy? What is dissolved when the purpose for which it was created has been achieved or when it is no longer required? A birth certificate of Galileo galilei? 50 different government agencies of the Philippines and their department heads? What is the gravel nest called that salmon burry their eggs in? What structures are not found in the axon? What is l glutamine? Why does microbes grow on food? When do snowflakes fall? Is Neptune not going to be a planet anymore? What is the barycenter of the sun and the Earth? Does the foramen magnum go through the occipital bone? How many minutes does a total solar eclipse last? Do vertical sun rays hit the tropic of cancer and Capricorn at all times? What are the breathing nerves? As the earth turns we see the stars move across the sky then the sun rises and we cant see the stars but if we could what stars would we see? What is the first step to cell resporation? Stratified squamous epithelium is usually found in areas of the body where the principle activity? Another name for the north?