First one has three and the second one has two germ layers.
The phylum that has three germ layers is the Chordata phylum. This phylum includes animals with bilateral symmetry and a notochord, which gives rise to the three germ layers (ectoderm, mesoderm, and endoderm) during embryonic development. Examples of Chordata include vertebrates like mammals, birds, reptiles, amphibians, and fish.
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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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.
Daphnia have three germ layers: ectoderm, mesoderm, and endoderm. These layers are formed during embryonic development and give rise to the different tissues and organs of the organism.
Germ layers.
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 primary germ layers form during the gastrulation stage of development.
The three primary germ layers in the gastrula are the ectoderm (outer layer), mesoderm (middle layer), and endoderm (inner layer). Each layer gives rise to different tissues and organs in the developing embryo.
Sponges have two germ layers therefore they are diploblastic.