1. What does the process of endosymbiosis refer to in cell evolution?
2. What structural feature of mitochondria and chloroplasts provides evidence supporting their origin via endosymbiosis?
3. How are macromolecules and water similar or different in their composition and bonding?
Endosymbiosis — evidence?
Organelle DNA, double membranes, bacterial size, division, ribosomes.
Endosymbiosis — definition?
Organism engulfs another, forming symbiosis.
Water — property?
Forms hydrogen bonds, acts as solvent, exhibits cohesion and density anomalies.
Mitochondria & chloroplasts — origin?
Derived from free-living bacteria.
Macromolecules — composition?
Proteins, nucleic acids, carbohydrates, lipids; built from monomers.
Membrane layers — significance?
Double membranes indicate engulfing event.
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