What type of ecosystem does an orca live in?

If nothing can escape a black hole in outer space how can you see photos of a black hole? History says what about the Persian Empire Alexander the Great and Ptolemy? Part of brain is associated with thoughts? Conclusion about units? What is the distance between nuclei in a hydrogen molecule.? What is it when liquid turns into rain? How many inches are in 470cm? Why summer time of water save? How are traits quality like hair color and eyes color passed from generation to generation? Is magnetic attraction or repulsion a chemical or physical change? Describe how compatibility group letters are used for HC 1 materials? Do Sugars and phosphate groups form the middle of a nucleic acid chain? What does a time zone of a place depend on? What metric measurement unit would be use to measure a pizza? Which line of longitude is japan closest to? Is Chromium Picolinate good for suppressing appetite? What is the vector of the Bubonic Plague? What type of landform that can be created at all three types of plate boundaries in California? Where is the sun located on a diagram of the earths orbit? Is development and progress of biology going very fast?