Which of the following has no central nervous system?

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Which of following system is segmentally arranged in annelids?

A. Excretory system B. Digestive system C. Criculatory system D. Nervous system...

Protonema is___________?

A. Thallus like B. Algae like C. Fungus like D. Plant like...

Normal action potential of a neuronal cell is ___________?

A. plus 50 mv B. plus 60 mv C. plus 70 mv D. plus 80 mv...

Photosystem II has molecules which absorbs maximum light of___________?

A. 680 nm B. 100 m C. 700 nm D. 670 nm...

Water potential of pure water is__________?

A. zero B. one C. negative D. two...