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In which animal nerve cell is present bu...

In which animal nerve cell is present but brain is absent?

A

Sponge

B

Earthworm

C

Cockroach

D

Hydra

Text Solution

Verified by Experts

The correct Answer is:
D
The neurons of Hydra synapse with each other and other body cells. As a result, it responds to external stimuli. However, there is no brain in Hydra to coordinate the responses.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-NEURAL CONTROL AND COORDINATION-Exercise
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  2. Which of the following statements is correct about node of Ranvier?

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  3. In which animal nerve cell is present but brain is absent?

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  4. What is the intensity of sound during normal conversation?

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  5. A characteristic of human cornea is

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  6. When we move from dark to light, we fail to see for some time but soon...

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  7. An action potential in the nerve fibre is produced when positive and n...

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  8. A person suffering from deficiency of visual pigment rhodopsin is advi...

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  9. Which of the following cranial nerves has the highest number of branch...

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  10. Which of the following is regarded as a unit of nervous tissue?

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  11. The junction between the axon of one neuron and the dendrite of the ne...

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  12. The Nissl's granules of nerve cell are made up of

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  13. In the chemistry of vision in mammals, the photosensitive substance is...

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  14. In frog, 'fenestra ovalis' is

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  15. The roof of the cranium of frog is formed by

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  16. Sympathetic neural system induces

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  17. Cornea transplantation is outstandingly successful because

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  18. In humans, visceral organs are innervated by

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  19. Sympathetic nerves in mammals develop from

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  20. Respiratory centre is situated in

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