Organization in the Living World- Practice Exercise Fill in the Blanks 1. The organelle most vital for the survival of a cells is………………………………… 2. Ribosomes are concerned with the synthesis of ……………………………….. 3. Cell wall is found only in…………………………..…………cells. 4. DNA is the abbreviated form of ………………………………………………….. 5. Movement of water across ceil membrane takes…