gastraea Antonyms
No Synonyms and anytonyms found
Meaning of gastraea
gastraea (n.)
A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their individual evolution pass through a two-layered structural stage, or gastrula form, must have descended. This idea constitutes the theory of Haeckel. See Gastrula.
gastraea Sentence Examples
- The gastraea theory posits that all animals evolved from a common ancestor resembling a two-layered embryo.
- The gastraea stage is characterized by the formation of two embryonic cell layers: the ectoderm and endoderm.
- The gastraea's ectoderm gives rise to the outer layer of the animal, while the endoderm forms the inner layer.
- The gastraea possesses a single opening that serves as both mouth and anus.
- The gastraea's digestive cavity is gastrovascular, meaning it both ingests and digests food.
- Some scientists believe that gastraea-like organisms existed as early as 540 million years ago.
- The gastraea's simple body plan may have enabled it to adapt to a variety of environments.
- The gastraea theory has influenced our understanding of animal evolution and the origin of body plans.
- Studying gastraea-like organisms can provide insights into the earliest stages of animal development.
- The gastraea is considered a key stage in the transition from unicellular to multicellular organisms.
FAQs About the word gastraea
A primeval larval form; a double-walled sac from which, according to the hypothesis of Haeckel, man and all other animals, that in the first stages of their ind
No synonyms found.
No antonyms found.
The gastraea theory posits that all animals evolved from a common ancestor resembling a two-layered embryo.
The gastraea stage is characterized by the formation of two embryonic cell layers: the ectoderm and endoderm.
The gastraea's ectoderm gives rise to the outer layer of the animal, while the endoderm forms the inner layer.
The gastraea possesses a single opening that serves as both mouth and anus.
