Hydra has
Correct answer C. Neuron-cells
Tip: press A, B, C or D to answer, and N for the next question.
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See allAny change in the environment of an organism is called
Correct answer A. Stimulus
Which of the followings are effectors?
Correct answer D. Both 'a' & 'b'
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Co-ordination results in
Correct answer D. All of these
Maximum speed of nerve impulse transmission is
Correct answer C. 120m/sec
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