🔤 Gastraea ✨

📖

🔊 Play Roman

qadeem farzi janwar, pet wala farzi jeev, ibtidai janwar ka namoona, theoritical jeev

🇬🇧

📚noun

gastraea

🗣️

DEFINITION

a hypothetical ancestral animal form consisting of a double walled sac, a theoretical gastrula like ancestor

EXAMPLE SENTENCES

Biologists once proposed the gastraea as the common ancestor of all multicellular animals. The gastraea theory suggested that early animals had a simple sac like body. Embryological evidence was used to support the concept of the gastraea. Modern evolutionary theory has largely replaced the gastraea hypothesis with other models. Students discussed the historical significance of the gastraea in developmental biology.