Z8600021 at 01:22, 20 October 2014

2014-10-20T01:22:40Z

← Older revision		Revision as of 12:22, 20 October 2014
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	=Chapter 4 The Materials of Evolution=		=Chapter 4 The Materials of Evolution=

	The apparent permanence of the types of animals		The apparent permanence of the types of animals and plants living at the present time is a common fact of observation. If this were the whole story it would appear that evolution had come to an end. If living things at the present time were really stable, we could give no good reason why it has not
	and plants living at the present time is a common
	fact of observation. If this were the whole story it
	would appear that evolution had come to an end.
	If living things at the present time were really
	stable, we could give no good reason why it has not
	always been so in the past. On the other hand, if this		always been so in the past. On the other hand, if this
	stability is deceptive, we might expect to find evolution still taking place at the present time as in the		stability is deceptive, we might expect to find evolution still taking place at the present time as in the
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	made since Darwin wrote, and that this new knowledge supports Darwin's view that the variations		made since Darwin wrote, and that this new knowledge supports Darwin's view that the variations
	shown by animals and plants furnish materials for		shown by animals and plants furnish materials for
	a theory of evolution. There is evidence that new		a theory of evolution. There is evidence that new characters suddenly arise by mutation both in domesticated and in wild types, and that these variations are inherited in the same way as are the differences present in wild types that distinguish them from one another. In addition there are variations (fluctuations) due to the action of the environment on the developing individual. These are not inherited and cannot therefore take part in evolution. These statements will be discussed in later chapters after Mendel's laws, and some other laws of heredity discovered since his time, have been examined.
	characters suddenly arise by mutation both in domesticated and in wild types, and that these variations are inherited in the same way as are the differences present in wild types that distinguish them
	from one another. In addition there are variations
	(fluctuations) due to the action of the environment
	on the developing individual. These are not inherited
	and cannot therefore take part in evolution. These
	statements will be discussed in later chapters after
	Mendel's laws, and some other laws of heredity discovered since his time, have been examined.

Z8600021 at 11:35, 16 October 2014

2014-10-16T11:35:35Z

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Z8600021 at 09:28, 16 October 2014

2014-10-16T09:28:51Z

← Older revision		Revision as of 20:28, 16 October 2014
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	{{Morgan1925 header}}		{{Morgan1925 header}}
	=Chapter 4 =		=Chapter 4 The Materials of Evolution=

Z8600021: Created page with "{{Morgan1925 header}} =Chapter 4 = {{Morgan1925 footer}}"

2014-10-16T09:23:01Z

Created page with "{{Morgan1925 header}} =Chapter 4 = {{Morgan1925 footer}}"

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=Chapter 4 =

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Book - Evolution and Genetics 4 - Revision history

Z8600021 at 01:22, 20 October 2014

Z8600021 at 11:35, 16 October 2014

Z8600021 at 09:28, 16 October 2014

Z8600021: Created page with "{{Morgan1925 header}} =Chapter 4 = {{Morgan1925 footer}}"