Question

answer my question pls pls pls​

Answer 1

Answer:

5. viruses make use of host mechansim

4.b

3.a) ozone is depleting because of global warming gases pollution eg CFC

b) the o-2 and o-3 are two forms

2.a) correct option

1. a) is correct option

Answer 2

Explanation:

Given

• Which of the following are physical changes?
• Melting of iron
• Rusting of iron
• Bending of an iron rod
• Drawing a wire of iron metal
• Since in rusting of iron its chemical combination is changed. So 1,3 and 4 holds good
• 2. Mass of one atom of oxygen is 16 g / 6.023 x 10^23
• 3. Ozone layer is getting depleted because of excessive use of man-made compounds containing fluorine and chlorine.
• 4. Two forms of oxygen found in the atmosphere are diatomic oxygen and ozone.
• 5. A particle is moving in a circular path of radius r. the displacement after half a circle would be 2 r  
• Displacement is total distance measured between initial and final points.
• 5. Making anti-viral drugs is more difficult than making anti-bacterial medicines because viruses have few biochemical mechanism of their own

Reference link will be

https://brainly.in/question/122971

https://brainly.in/question/903320