Question

Complete burning of plant material returns carbon primarily to the............

A. herbivores.

B. water.

C. vegetation.

D. atmosphere.

Answer 1

atmosphere in form of CO2

Answer 2

Atmosphere but not in the form of CO2. You should look up "black carbon."

Answer 3

ok.. some part also get converted into CO2 as carbohydrate is also present in that manner i said :?

Answer 4

It would if it burned all the way to its individual carbon atoms, but it almost *never* happens that carbohydrates (as in plant material) burn that far. The fire isn't hot enough to reduce them to CO2. I realize now that the question says a complete burn - but as that situation will almost never arise in real life, the question doesn't have much credibility in my opinion. In real life, burning plant material results mainly in soot. Soot has its own environmental relevance, which is the realistic answer should be about black carbon, not C02.

Now hydrocarbons - as opposed to carbohydrates - are a completely different story....

Answer 5

ok.. thnx )