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This YouTube video explains how to calculate a regular area on a map.

From the extinction of the dinosaurs to humanity.

Overview of fertilisation and early human development. From conception leading to a zygote to blastocyst, embryo and fetus.

Introduction to the cell.

Introduction to cellular respiration, glycolysis, the Kreb's Cycle, and the electron transport chain.

How variation can be introduced into a species.

Diffusion and Osmosis

Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase.

Molecular structure of DNA. Nucleotide. Nitrogenous base, phosphate.

Introduction to the circulatory system and the heart