Unit 7 · 7.7 — Common Ancestry [cite: 28, 44]

Everything to learn here

• Concept: Deeply conserved core molecular and cellular features (e.g., universally using DNA/RNA as genetic material, identical ribosomes, core metabolic pathways) strongly support the universal common ancestry of all recognized life on Earth [cite: 13, 21].
• Concept: Shared features like linear chromosomes and membrane-bound organelles provide structural evidence that all eukaryotes share a common ancestor.
• Skill: Predict how changes to conserved eukaryotic structures, such as introns or organelles, might affect the fitness of an organism.

Practice problems for this topic are coming — generated and validated by our AI pipeline, aligned to these exact items.