Reproduction occurs in all organisms. DNA is important ... Genetic inheritance controls the characteristics of all living things. Variation - AQA Variation in species can be generated by genetics.

Genetic inheritance controls the characteristics of all living things ... cause characteristics of organisms to change over time. This process of natural selection leads to the evolution of ...

What are these living units called cells ... sometimes as part of complex multicellular organisms. Cells also differ in size. Although cells can be quite large — consider a frog's egg, for ...

To become a biologist, you must first complete secondary school education and obtain a qualification such as an A level or equivalent in biology. A qualification in one of physics, chemistry or maths ...