Test on Class 9th Biology on Fundamental Unit of Life:Cell. How do substance like CO2 and Water move in out of the cell ?.

Distinguish between speed and velocity ?. What is Acceleration ?. Graphically prove the first equation of motion ?.

What is Resource ?. Classify and Explain Various Type of Resources ?. What is Sustainable development ?.

One part of the sentence contains error. Find the part which has error in the below sentences.