 A highly organized plant which begins its development with the simplest stages and gradually advances to a higher state of differentiation repeats in its ontogeny itsphylogenetic development " ; and further on, " From the fossil remains of former geological...  A Text-book of botany - Pàgina 46per Eduard Strasburger - 1898 - 632 pàginesVisualització completa - Sobre aquest llibre
 | dr. eduard strasburger, dr. ludwig jost, dr. heinrich schenck - 1912 - 864 pàgines
...proportion, its importance in defining the character of a genus or species. From the fossil remains 168 of former geological periods, it is safe to conclude...Conifers with needleshaped leaves. This conclusion is confirmed by the fact that on the young plants of the scaly-leaved Conifers typical needle-shaped leaves... | |
 | New Zealand Institute - 1899 - 954 pàgines
...state of differentiation repeats in its ontogeny itsphylogenetic development " ; and further on, " From the fossil remains of former geological periods...confirmed by the fact that on the young plants of the scaly Conifers typical needle-shaped leaves are at first developed. The modified leaf-form does not... | |
 | New Zealand Institute - 1899 - 948 pàgines
...state of differentiation repeats in its ontogeny its phylogenetic development " ; and further on, " From the fossil remains of former geological periods...that such Conifers as Thuja, Biota, and the various Jumpers that now have scalelike compressed leaves have been derived from Conifers with needle-shaped... | |
 | 1899 - 1068 pàgines
...state of differentiation repeats in its ontogeny its phylogenetic development " ; and further on, " From the fossil remains of former geological periods...that such Conifers as Thuja, Biota, and the various Jumpers that now have scalelike compressed leaves have been derived from Conifers with needle-shaped... | |
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