Question

During which of these processes is oxygen consumed?

1.when plants perform photosynthesis
2.when plants or animals perform aerobic cellular respiration
3.when aerobic bacteria break down dead algae in a pond
4.when forests are burned to clear land for farming

MULTIPLE CHOICE PICK MORE THAN ONE

Answer 1

Hello friends

Statement: During which of these processes is oxygen consumed?

Answer: 1.when plants perform photosynthesis, 3.when aerobic bacteria break down dead algae in a pond , 4.when forests are burned to clear land for farming

Explanation:

1. When plants perform photosynthesis they consume oxygen and release carbon dioxide in the environment.

3.Aerobic reactions are those reaction that require oxygen as their fuel to occur. So when aerobic bacteria break down algae in pond, the would require oxygen.

4. Fire uses oxygen as its fuel to heighten up. That is why when their is a fire,it becomes hard to breathe due to lack of oxygen. So when a forest is burning down, the oxygen is being utilized.  

Thanks

Answer 2

The answer is option 1 and2