Let’s take a look at the Chapter 4 of Biology of Grade 9 "Cells and Tissues". To watch the full chapter, click the link below: https://www.youtube.com/playlist?list=PLhVq_Uq8AfHVCPylfvbTYvXKN39aybZBy In this chapter, you will learn the concepts of microscopy, and how the cell theory originated and reached its final form. It provides the basic idea of cellular structures and the functions they perform, the impact of cell size on the surface area to volume ratio, and the mechanisms through which m