MCQ
Chromosomes move towards the pole during
- AProphase
- BMetaphase
- CTelophas
- ✓Anaphase

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$(1)$ On and average a healthy human breaths ...$X$....times/minutes
$(2)$ Every $100\, ml$ of oxygenated blood can deliver around ....$Y$.... of $O_2$ of the tissues under normal physiological conditions.
$X-Y$