Question:
A nervous system is lacking in __________
A nervous system is lacking in __________
Show Hint
Think of the level of organisation of each animal.
Updated On: Nov 12, 2026
- gorilla
- cockroach
- Hydra
- sponges
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Sponges (phylum Porifera) are at the cellular level of organisation. They have no true tissues, organs or nerve cells.
Step 2: Other animals
Hydra has a diffuse nerve net, cockroach has a ventral nerve cord with ganglia, and gorilla has a brain and spinal cord.
Step 3: Conclusion
Only sponges lack a nervous system.
Final Answer:
Nervous system is absent in sponges. \[ \boxed{\text{(D) }\text{sponges}} \]
Sponges (phylum Porifera) are at the cellular level of organisation. They have no true tissues, organs or nerve cells.
Step 2: Other animals
Hydra has a diffuse nerve net, cockroach has a ventral nerve cord with ganglia, and gorilla has a brain and spinal cord.
Step 3: Conclusion
Only sponges lack a nervous system.
Final Answer:
Nervous system is absent in sponges. \[ \boxed{\text{(D) }\text{sponges}} \]
Was this answer helpful?
0
0
Top MHT CET Biology Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- Important sperm lysin used for dissolving egg covering is
- In biogas plant, the role of acidogenic bacteria is to
- In $C_{3}$ plants, the first stable product of photosynthesis during the dark reaction is
- In case of anaerobic respiration, the RQ is ___________
View More Questions
Top MHT CET Nervous system Questions
- Which region of the brain plays a crucial role in regulating glomerular filtrate by influencing the release of hormones involved in kidney function ?
- Impairment of Glossopharyngeal nerve will most probably NOT affect ............
- Which one of the following cross/es did Mendel perform?
- In somatic reflexes, the effectors are located in ..................
- Injury to medulla oblongata causes sudden death mainly as ............
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions