In embryology, animals with bilateral symmetry, like arthropods (and also humans) produce three germ layers. Animals with radial symmetry like echinoderms produce two.
Note that the term 'anthropod' should not be confused with 'arthropod' - anthropod is not a phylum nor taxon but is a broader term meaning human or humanoid.
As many as you think it should have.
Three
One wold not describe the anatomy of an Earthworm in terms of "layers". For this reason we do not understand what you are asking.
in think he uses 89 layers of paints according to the book"PICASSO"
Large sea scorpions that lived during the Cambrian period were called Euripterids, and some were up to eight feet long!
Three cell layers known as the ectoderm, mesoderm, and endoderm. They are also referred to as the primary germ layers, because all of the organs and tissues of the embryo will be formed from them.
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During blastula there will be two germ layers 1)ectoderm 2)endoderm, after gastrulation , there will be three germ layers 1) Ectoderm 2) Endoderm 3) Mesoderm
No they do not. I am not certain as to whether they have 0 or 2 germ layers but it is one of the two.
Insects have one germ band that grows. There are three germ layers which can be found on most insects and are responsible for development.
They have two layers the endoderm and ectoderm.
First one has three and the second one has two germ layers.
Formation of germ layers is related to gasrtulation . When cells migrate from out side to inside , germ layers are established .
yessir
Sponges have two germ layers therefore they are diploblastic.
Phyla that have only two germ layers are Cnidaria and Ctenophora. These phyla are considered diploblastic, meaning they develop from two embryonic germ layers: endoderm and ectoderm. organs. This is in contrast to triploblastic animals, which have three germ layers (endoderm, mesoderm, and ectoderm).
the three germ layers on a squid are the ectoderm, endoderm and mesoderm