MHT CET 202623 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 23 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Animal Kingdom
MHT CET 2026 · 23 April · Evening Shift · Biology · Animal Kingdom
Which of the following is INCORRECT regarding the nervous system of...
Which of the following is INCORRECT regarding the nervous system of Planaria?
Options
- AIt is the most primitive animal having CNS
- BIt consists of U-shaped brain
- CIt belongs to the phylum Aschelminthes.
- DThe eyes are located on dorsal side of the brain
Correct answer
C. It belongs to the phylum Aschelminthes.
Step-by-step solution
Planaria belongs to the phylum Platyhelminthes, not Aschelminthes. It is a flatworm.
It is considered the most primitive animal to possess a central nervous system (CNS), which consists of a bilobed (often described as inverted U-shaped) brain and two longitudinal nerve cords connected by transverse nerves, forming a ladder-like structure.
The eyespots (ocelli) are located on the dorsal side of the head, near the brain, and are sensitive to light.
Therefore, the statement that it belongs to the phylum Aschelminthes is incorrect.
Answer: It belongs to the phylum Aschelminthes.
It is considered the most primitive animal to possess a central nervous system (CNS), which consists of a bilobed (often described as inverted U-shaped) brain and two longitudinal nerve cords connected by transverse nerves, forming a ladder-like structure.
The eyespots (ocelli) are located on the dorsal side of the head, near the brain, and are sensitive to light.
Therefore, the statement that it belongs to the phylum Aschelminthes is incorrect.
Answer: It belongs to the phylum Aschelminthes.