did the theory face any problems?
This difficulty can be referred to as the absence or rarity of transitional varieties in habitat space.
On the Origin of Species
 This difficulty can be referred to as the absence or rarity of transitional varieties in habitat space.
when was charles darwin's book the origin of species published 24 November 1859 what was it about? The book presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution. was it received well? The book aroused international interest and a widespread debate, with no sharp line between scientific issues and ideological, social and religious implications. what style of writing is followed in this? He added that some parts of "Origin" are dense, but other parts are almost lyrical, and the case studies and observations are presented in a narrative style unusual in serious scientific books, which broadened its audience.
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On the Origin of Species [SEP] Difficulties for the theory
This difficulty can be referred to as the absence or rarity of transitional varieties in habitat space. Another difficulty, related to the first one, is the absence or rarity of transitional varieties in time. Darwin commented that by the theory of natural selection "innumerable transitional forms must have existed," and wondered "why do we not find them embedded in countless numbers in the crust of the earth?" (For further discussion of these difficulties, see and Bernstein et al. and Michod.) The chapter then deals with whether natural selection could produce complex specialised structures, and the behaviours to use them, when it would be difficult to imagine how intermediate forms could be functional.