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.
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What we have learnt
- Genetic information is passed through DNA replication and affects protein synthesis.
- Cellular processes such as division ensure genetic material is accurately distributed.
- Homeostasis is maintained through regulatory mechanisms within organisms.
Key Concepts
- -- DNA Replication
- The process by which a cell copies its entire genome to ensure each daughter cell receives an exact copy of genetic information.
- -- Protein Synthesis
- The translation of genetic information from mRNA into a polypeptide chain, essential for cellular function.
- -- Natural Selection
- The process through which individuals with advantageous traits survive and reproduce, shaping the evolution of species.
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