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Ancel Keys and his research team observed that men on a semistarvation diet
Lancelets
Small marine invertebrates of the subphylum Cephalochordata, regarded as key to understanding the evolution of vertebrates.
Shallow Coastal Waters
Areas near the shore in oceans and seas where the water depth is relatively low, supporting diverse ecosystems.
Vertebrate Evolution
The process of change and diversification in vertebrates over time, leading to the current diversity of species with backbones.
Lobe-Finned Fish
A class of fish known for having fleshy, lobed, paired fins, which are precursors to the limbs of terrestrial vertebrates.
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