In most other groups, the Blastula undergoes more complicated rearrangement.
In sponges, Blastula larvae swim to a new location and develop into a new sponge.
In sponges, Blastula larvae swim to a new location,
attach to the seabed, develop into a new sponge.
In sponges, Blastula larvae swim to a new location,
attach to the seabed, and develop into a new sponge.
The Blastula stage typically features a fluid-filled cavity, the
blastocoel, surrounded by a sphere or sheet of cells, also called blastomeres.
In this understanding, animals like taxa have more definite signs- they are characterized by oogamy, a multi-tissue structure, the presence of at least
two germ layers, the stages of Blastula and gastrula in embryonic development.
In this understanding, animals as a taxon have more definite characteristics- they are characterized by oogamy, a multi-tissue structure,
the presence of at least two germ layers, Blastula stages and gastrula stages in embryonic development.
In this understanding, animals like taxa have more definite features- they are characterized by oogamy, a multi-tissue structure, the presence of at least
two germ layers, the stages of Blastula and gastrula in embryonic development.