Question

Q: Read Chapter 1 and 2 carefully and answer the following questions.
Q1: Why the percentage composition of oxygen is more than other bio elements in
organisms?​

Answer 1

Answer:

ooo which class u readdddd

Answer 2

Answer:

Because oxygen bind with haemoglobin for transportation of food and blood vessels are everywhere in our inner body so our body needs more oxygen so that transportation is efficient so that percentage composition of oxygen is relatively high than other bio elements.

This is what I think. I wrote something at least. haha