These chapters will be followed by a
discussion of certain difficulties, and of the vexed question of
hybridity. Then will come a rather full account of the more important of
the complex relations of organisms to each other and to the earth
itself, which are either fully explained or greatly elucidated by the
theory. The concluding chapter will treat of the origin of man and his
relations to the lower animals.
FOOTNOTES:
[Footnote 1: _Geography and Classification of Animals_, p. 350.]
[Footnote 2: These expressions occur in Chapter IX. of the earlier
editions (to the ninth) of the _Principles of Geology_.]
[Footnote 3: L. Agassiz, _Lake Superior_, p. 377.]
CHAPTER II
THE STRUGGLE FOR EXISTENCE
Its importance--The struggle among plants--Among
animals--Illustrative cases--Succession of trees in forests of
Denmark--The struggle for existence on the Pampas--Increase of
organisms in a geometrical ratio--Examples of great powers of
increase of animals--Rapid increase and wide spread of
plants--Great fertility not essential to rapid
increase--Struggle between closely allied species most
severe--The ethical aspect of the struggle for existence.
Pages:
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47