PALABRAS DEL INGLÉS RELACIONADAS CON «GASTRAEA»
gastraea
urmetazoan
hypothetical
last
common
ancestor
animals
undoubtedly
marine
beyond
this
form
difficult
determine
five
different
hypotheses
have
been
forward
discriminating
gastraea
merriam
webster
with
audio
pronunciations
word
games
biol
primeval
larval
double
walled
according
hypothesis
haeckel
other
first
stages
theory
biology
encyclopedia
britannica
though
concepts
recapitulation
were
error
brought
attention
important
biological
questions
tracing
multicellular
origins
higher
life
forms
ernst
basis
seems
provide
reasonable
TENDENCIAS DE USO ACTUALES DEL TÉRMINO «GASTRAEA»
El término «gastraea» apenas se utiliza habitualmente y ocupa la posición
199.497 de nuestra lista de términos más usados del
diccionario de inglés.
En el mapa anterior se refleja la frecuencia de uso del término «gastraea» en los diferentes paises.
Principales tendencias de búsqueda y usos comunes de
gastraea
Listado de las príncipales búsquedas realizadas por los usuarios para acceder a nuestro
diccionario de inglés en línea y expresiones más usadas con la palabra «gastraea».
10 LIBROS DEL INGLÉS RELACIONADOS CON «GASTRAEA»
Descubre el uso de
gastraea en la siguiente selección bibliográfica. Libros relacionados con
gastraea y pequeños extractos de los mismos para contextualizar su uso en la literatura.
1
Progress in Invertebrate Zoology
The double-layered form, with Urmund (blastopore) and gastral cavity (
archenteron), represents the gastrula stage and is known as the hypothetical
gastraea in the Metazoan ancestor. The gastraea theory was first put forward by
Ha'ckel.
The gastraea hypothesis suggests that the primitive nature of sponges and
coelenterates lies in their persistence at this diploblastic gastrula level. An
extension of the gastraea hypothesis is that an important body cavity of most
metazoans, the ...
Monroe W. Strickberger, 2005
3
Modern Text Book of Zoology: Invertebrates
(4) Endoderm is fundamentally produced by imagination, all other methods being
secondary modifications of invagination. 2. Support. Haeckel's Gastraea Theory
about ancestry of the Metazoa is mainly based on the embryological evidence.
4
Individual Development and Evolution: The Genesis of Novel ...
But the low animal forms which constitute the ancestral line between the
unicellular amoeba and the gastraea, and further between the gastraea and the
ascidian form, can only be approximately conjectured with the aid of comparative
...
5
Invertebrate Relationships: Patterns in Animal Evolution
One variant of gastraea theories that does avoid some of the problem areas has
recently been advanced by Nielsen & N¢rrevang (1985). They suggest that a
common monociliate gastraea stock gave rise directly to Cnidaria, and also via a
...
6
The Evolution of Man (Complete)
Justasthe countless species ofthe Metazoa do actuallydevelop in the
individualfrom the simple embryonicformofthe gastrula, so they
havealldescended inpast time from thecommon stemformofthe Gastraea. In this
fact,andthe fact we have ...
Ernst Heinrich Philipp August Haeckel
Gastraea hypothesis The gastraea hypothesis was proposed by Ernst Haeckel,[2]
shortly after his work on the calcareous sponges. He proposed that this group of
sponges is monophyletic with all eumetazoans, including the bilaterians.
8
Biology Takes Form: Animal Morphology and the German ...
Those forms which were repeated in otherwise widely different types were much
more likely to represent the original state than a later interpolation. This is the
basis for Haeckel's faith in the existence of the ancient gastraea: since he found
the ...
This theory is known as the Gastraea Hypothesis. Today, the Planula Hypothesis,
a variant of the Gastraea Hypothesis, is more popular, but the problems remain
the same as for the Gastraea Hypothesis of Ernst Haeckel (figure 5.5). Using the
...
10
Ontogeny and Phylogeny
Organs or Ancestors: The Transformation of Haeckel's Heterochrony Many have
traced the demise of Haeckel's theory to the inadequacy of his gastraea — that "
lean animal-specter"3 — as a satisfactory ancestor for all metazoans; or rather to
...
NOTICIAS EN LAS QUE SE INCLUYE EL TÉRMINO «GASTRAEA»
Conoce de qué se habla en los medios de comunicación nacionales e internacionales y cómo se emplea el término
gastraea en el contexto de las siguientes noticias.
Acoel development indicates the independent evolution of the …
a, Hypotheses based on a simultaneous evolution of mouth and anus (top) either start with a pelagic hypothetical ancestor (gastraea and ... «Nature.com, Sep 08»
