Where is mitochondria occur?

Is a crack in folded rocks is called a focus.? What would occur if a semipermeable membrane has a 4 percent salt solution on the right side and a 12 percent salt sodiumon tsolution on the left side? How many meter in 1600 sq feet? How did the Doppler effect lead to the Big Bang theory? What units would you use to express the volume of an irregular solid such as a rock? Can white clover grow in sand? What is predator for forget-me-not? How does Rutile form? Is water nitrogen carbon and oxygen recycled in ecosystems? How hot is the melted rock inside earth? What test would you perform to discover whether a metal bar is a magnet or not? How long does a water soluble cell response take? What branch of science was Dorothy Hill in? What observation of seismic wave travel led to the discovery of the Moho? What year should there be a hurricane Ryan? Is nervousness is a common or proper noun? When was Waiting for Snow in Havana created? What is the name of the protein found in erythrocytes that transports respiratory gases? Why are phosphorescent pigments safer than alternative substances for glow in the dark paints? What is the largest object that is orbiting the sun?