Question

Correct sequence in embryonic development of frog is :

• A. Zygote $ \to $ Cleavage $ \to $ Blastula $ \to $ Gastrula
• B. Zygote $ \to $ Cleavage $ \to $ Gastrula $ \to $ Blastula
• C. Cleavage $ \to $ Zygotes $ \to $ Blastula $ \to $ Gastrula
• D. Zygote $ \to $ Blastula $ \to $ Cleavage $ \to $ Gastrula

Answer 1

Answer: (A)

In frog the zygote after about two and a half hours of fertilization undergo long series of changes involving repeated mitotic cell division, cell growth and differentiation, formation of tissues and organs develops into a larval form called tadpole. The sequential stages of divisions are-Early cleavage -> Morula $ \to $ Blastula $ \to $ Gastrula stage $ \to $ stage of 3 primary germ layers $ \to $ organogeny $ \to $ Formation of tadpole.