Organic Evolution: Outstanding Difficulties and Possible Explanations

ISBN-13: 9781316633465 / Angielski / Miękka / 2017 / 56 str.

Leonard Darwin

Opis

Originally published in 1921, this book by Major Leonard Darwin (1850-1943) presents a personal perspective on evolution.

Spis treści

Preface; 1. The selection of infrequent mutations and the inheritance of acquired characters could not alone account for evolution; 2. To admit the selection of small and frequent mutations amongst the explanations of evolution demands the solution of several unsolved problems; 3. The existence of a system of mutations due to imperfect segregation is suggested as one of the possible explanations; 4. The problems to be solved include the appearance of new forms and the bifurcation of species; 5. Infertility between species and facts connected with pure lines have also to be explained; 6. In experiments designed to test this hypothesis natural conditions should be imitated as far as possible.