Explain the following:
A. Why do mountain climbers need oxygen tanks while going on high altitude? [2 MARKS] B. If you climb a mountain without any equipment, your nose will start to bleed. Why? [2 MARKS]
A. Why do mountain climbers need oxygen tanks while going on high altitude? B. If you climb a mountain without any equipment, your nose will start to bleed. Why? [5 MARKS]
Why do organisms need water? [1 MARK]