Upon fertilization of the egg cell, the contents within the zygote are distributed unevenly (polarization), followed by asymmetric cell division, where the top daughter cell is small and the ...

To use a light microscope to examine animal or plant cells. To make observations and draw scale diagrams of cells. Turn the coarse focus so that the stage is as close to the objective lens as ...

Learn about and revise cells and their functions with BBC Bitesize for GCSE Biology, OCR 21C.