What is the green thing in leaves called?

How can a Cell membrane compared to a castle? Is granite a mineral a rock a gem or an ore? What statement best explains acceleration? Name something that goes around the world? Does water that flows quickly have less oxygen than water that is still? In the solar system which planet has rings around it? . In a ball-and-stick molecular model what do the sticks represent? What are the major geographical features of Zambia? Which substance can be removed by filtering water? What is the process of vesicles releasing their contents outside the cell? What are dendrites and the cell body in? What is considered the primary bone building cell? What is An organisms roll in an ecosystem? What is the going rate for metals in a penny? Is a hibiscus flower gamopetalous or sympetalous? Is the Lines of latitude are the horizontal lines that measure the distance north or south from the equator? What four organelles must be present in frogs? How are rocks and grains different? Why is Water coming out of vents is bubbling? How good is a mouses sense of hearing?