General biology notes

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Our natural world also utilizes the principle of form following function, especially in cell biology, and this will become clear as we explore eukaryotic cells. Unlike prokaryotic cells, eukaryotic cells have: 1) a membrane-bound nucleus; 2) numerous membrane-bound organelles such as the endoplasmic reticulum, Golgi apparatus, chloroplasts, mitochondria, and others; and 3) several, rod-shaped chromosomes. Because a eukaryotic cell’s nucleus is surrounded by a membrane, it is has “true…

IGCSE Biology Revision Notes - Download as a PDF or view online for free

*This is not an exhaustive list of all topics covered during science class, but rather a guide for your learning and review. Always make sure to take your own notes during class! Leaf Anatomy (Life Science) Photosynthesis (Life Science) Plant Cell Organelles (Life Science) Cellular Respiration (Life Science) Unicellular Organisms

In the nucleus of each cell, DNA is packaged into thread-like structures called chromosomes. Each chromosome consists of DNA tightly coiled around proteins called histones that support its structure. Chromosomes play a vital role in heredity, mutation, variation, and evolutionary development of species.