I'm pretty sure the answer would be DNA, because DNA is the thing that holds all of your genetic material/ traits/ genes
Answer:
40%
Explanation: The question says in contrast to the 60% so were finding the other percentage to equal the whole 100% of the class. You would take 100 and subtract 60 from it to get an answer of 40%.
Well, it's actually 3 things. You release oxygen, carbon dioxide, and nitrogen. Hope this helps!
It would be the iris and the lens