Dollo’s law: A biological generalization positing that complex characters, once lost in evolution, are extremely unlikely to reappear and thus the loss of complex characters is virtually always irreversible.

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#Id: 6698

#Unit 3. Fundamental Processes

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#Id: 5208

#Unit 7. System Physiology – Animal

The endothelium of the blood vessels also plays an active role in preventing the extension of clots. 

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#Id: 7263

#Unit 6. System Physiology – Plant

Form I is found in most autotrophic organisms. Contributing up to 50% of soluble leaf protein, it is the predominant protein in plant leaves.

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#Id: 9218

#Unit 6. System Physiology – Plant

2-phosphoglycolate is metabolized through the C2 oxidative photosynthetic carbon cycle.

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#Id: 3720

#Unit 10. Ecological Principles

Clement’s organismic model - Competition causes sharp boundaries between groups of species; certain species group together.