II. Grasses, and the Evolution of Life

Editors, Environment

Abstract


As a comparison of the apparently trivial with the obviously great and spectacular, the following remarks by the President of the British Association, 1935 (Professor W. W. Watts, F.R.S.) in his Presidential Address are given: Evolution of life on the earth has been by no means uniform; there have been periods of waxing and waning which may be attributed to geographical, climatological, and biological influences. The development of large land areas, ranged longitudinally or latitudinally, the invasion of epi-continental seas, the isolation of mediterraneans or inland seas, the splitting of continental areas into archipelagos or the reunion of islands into continuous land, the making of barriers by the rearing of mountain chains or the formation of straits or arms of the sea, the oncoming of desert or glacial climates; all such factors and many others have been of importance in quickening or checking competition, and in accelerating or retarding the evolution of life.

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