Biology
Medium
Question
Which of the following has no central nervous system?
A
Hydra
✓ Official correct answer
B
Man
C
Planaria
D
Cockroach
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
Hydra
No member explanations yet for this option.
B
Man
No member explanations yet for this option.
C
Planaria
No member explanations yet for this option.
D
Cockroach
No member explanations yet for this option.