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IB 11 Biology
This chapter explores the continuity of life through genetic mechanisms such as DNA replication, protein synthesis, and mutation, as well as the processes of inheritance and evolution. It delves into cellular functions like division and gene expression, emphasizing hormonal and environmental controls that maintain homeostasis. The impact of natural selection, coupled with the challenges of climate change, highlights the dynamic relationship between stability and change in biological systems.
Course Chapters
Theme A: Unity and Diversity
The exploration of unity and diversity among living organisms reveals fundamental molecular structures, cellular architectures, and evolutionary histories shared across various life forms. By investigating the principles of water, nucleic acids, and cell origins, the chapter underscores the significance of genetic, species, and ecosystem diversity. Furthermore, the urgent need for conservation due to human impact on biodiversity is highlighted, emphasizing the interconnectedness of ecological systems.
Theme B: Form and Function
The chapter explores the interconnection between biological form and function at multiple levels of organization, from molecules to ecosystems. It emphasizes that structural adaptations enhance physiological performance and survival, highlighting key themes in molecular architecture, cellular organization, organismal morphology, and ecosystem dynamics. Each level exhibits unique structural features that facilitate specific functional roles, aligning with themes of adaptation and evolutionary biology.
Theme C: Interaction and Interdependence
The chapter focuses on the theme of Interaction and Interdependence, exploring both molecular and ecological connections within biological systems. Key topics include enzyme functionality, cellular respiration, metabolic pathways, and photosynthesis, along with signaling mechanisms and the integration of body systems. The final sections address population dynamics and the cycling of matter and energy within ecosystems, highlighting the delicate balance of these interconnections in maintaining life on Earth.
Theme D: Continuity and Change
This chapter explores the continuity of life through genetic mechanisms such as DNA replication, protein synthesis, and mutation, as well as the processes of inheritance and evolution. It delves into cellular functions like division and gene expression, emphasizing hormonal and environmental controls that maintain homeostasis. The impact of natural selection, coupled with the challenges of climate change, highlights the dynamic relationship between stability and change in biological systems.