Biology · Growth and Development
Work through this past-paper style MCQ, then read the full explanation. Practice more biology questions on mMCQ with adaptive practice and topic analytics.
During the development of the chick peripheral part of the blastoderm lies unseparated from the yolk and forms:
- A
Area pellucida
- B
Area opaca
- C
Notochord
- D
Primitive streak
During the development of a chick embryo, the peripheral part of the blastoderm that remains attached and unseparated from the yolk forms the Area pellucida.
During the development of a chick embryo, the peripheral part of the blastoderm that remains attached and unseparated from the yolk forms the Area pellucida.
During chick development, the blastoderm spreads over the yolk and differentiates into two regions. The central, transparent part is called the area pellucida, while the peripheral part remains thick and is directly in contact with the yolk. This outer, opaque region that stays attached to the yolk is called the area opaca. It mainly helps in absorbing nutrients from the yolk to support the developing embryo. this option is correct
This option is also incorrect. Notochord is a rod-like structure that develops along the midline of the embryo and plays a crucial role in skeletal development.
This option is also incorrect. The primitive streak is a structure that forms during gastrulation, marking the midline of the dorsal surface of the embryo.
Tagged under Biology · Growth and Development · 2010