B3.2 How has life on Earth evolved? Life on Earth began around 3500 million years ago. ALL life on Earth, including all life that is now extinct, evolved from very simple living things- so all organisms share a common ancestor. However there is variation between...
B3.3 What is the importance of biodiversity? Organisms are classified into groups according to similarities and differences in characteristics including: Physical features (e.g. flowers in flowering plants and the skeletons in vertebrates DNA The groups start off...
B3.1 Systems in balance – how do different species depend on each other? A group of organisms that can breed together and produce fertile offspring is called a SPECIES. All things rely on their environment and other species to survive. The individuals in a species are...