Static textbook diagrams of the heart beating or the diaphragm moving are hard to grasp. Search YouTube for "How the human heart works" in your native language to complement the book.
Read the case study of the peppered moth ( Biston betularia ) during the Industrial Revolution. biologija za 9 odd ucebnik
Evidence for evolution and how it explains the diversity of life on Earth. : How living organisms interact with their environment. Static textbook diagrams of the heart beating or