William Lawrence was a person who studied living things, called a biologist. He learned about animals and plants and how they grow and change over time. He looked at things so closely that he could see little tiny things called cells that make up everything living.
He found out that cells are really important because they are like little factories that do all the hard work of keeping things alive. Without cells, nothing could live!
William Lawrence also studied something called genetics, which is like a recipe book that tells living things how to grow and be a certain way. He learned about how different traits, like eye color or height, are passed down from parents to their children.
Nowadays, we still use the things that William Lawrence learned to help us understand animals and plants even better. Thanks to people like him, we know much more about how life works!