Biological forms refer to the various structures and shapes that living organisms can take. These forms are influenced by genetic information and environmental factors, leading to a wide diversity in species. For example, the human body has a distinct shape, while trees exhibit different forms based on their species and habitat. In biology, these forms can be categorized into different levels, such as cells, tissues, and organs. Each level has specific functions that contribute to the overall survival and reproduction of the organism. Understanding biological forms helps scientists study evolution, ecology, and the relationships between different species.