Question
Correct sequence of embryonic developmental stages:
A. Blastula
B. Neurula
C. Morula
D. Fertilized egg
E. Gastrula
Choose the correct answer from the options given below:
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
D, C, A, E and B
Embryonic Development Stages Sequence
Understanding the correct sequence of embryonic development is essential. The process involves distinct stages, beginning with fertilization and progressing through significant structural and organizational changes in the developing organism.
Key Embryonic Stages Explained
- Fertilized egg (D): This is the starting point, the single cell (zygote) formed when a sperm fertilizes an egg.
- Morula (C): Following fertilization, the zygote undergoes rapid cell division (cleavage) to form a solid ball of cells known as the morula.
- Blastula (A): The morula develops further into a blastula, which is a hollow ball of cells containing a fluid-filled cavity called the blastocoel.
- Gastrula (E): This crucial stage involves significant cell movement and rearrangement, leading to the formation of the three primary germ layers: ectoderm, mesoderm, and endoderm.
- Neurula (B): The neurula stage is characterized by the formation of the neural tube from the ectoderm, which will develop into the central nervous system.
Establishing the Correct Developmental Order
The sequence of these stages follows a specific biological timeline:
- Fertilized egg (D)
- Morula (C)
- Blastula (A)
- Gastrula (E)
- Neurula (B)
This order can be represented as: D $\rightarrow$ C $\rightarrow$ A $\rightarrow$ E $\rightarrow$ B.
Identifying the Correct Option
The option listing the stages in the correct order D, C, A, E, B accurately reflects the sequence of embryonic development.
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