MCQ
Neuron becomes an electrically charged cell by the diffusion of
- A$K$
- ✓$Na$
- C$P$
- D$Ca$
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$(i)$ All living organisms have ability to respond the environment stimuli which could be physical, chemical or biological.
$(ii)$ Plants respond to external factors like light, water, temperature, other organisms, pollutants, etc.
$(iii)$ Photoperiod affects the process of reproduction.
$(iv)$ Human being is the only organism who has self consciousness.