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A commonly used experimental procedure for the study of granulocyte kinetics involves the labelling and subsequent tracing of granulocyte DNA. Following the introduction of a label into the system, observations are made periodically on the concentration of label in the DNA of granulocytes taken...
This paper discusses a deterministic model of the spread of an infectious disease in a closed population that was proposed byKermack &McKendrick (1927). The mathematical assumptions on which the model is based are listed and criticized. The ‘threshold theorem’ according to which an epidemic...
The importance of deviation-amplifying processes for the emergence of major evolutionary novelties is discussed by exemplifying the evolution of birds and the term ‘chain evolution’ is proposed.
Functional explanations are regarded as a special type of explanation by many biologists. Philosophers of science tend to agree that they are weak forms of the common modes of explanation, although the elucidation of the logical structure involved is difficult. The present paper shows that...
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