MCQ
At a neuromuscular junction, synaptic vesicles discharge ______.
- AAcetylcholine.
- BEpinephrine.
- CAdrenaline.
- DNone of these.
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$(a)$ It is also called as the earlywood
$(b)$ In spring season cambium produces xylem elements with narrow vessels
$(c)$ It is lighter in colour
$(d)$ The springwood along with autumnwood shows alternate concentric rings forming annual rings
$(e)$ It has lower density
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