Question

Is all of Earth’s carbon dioxide supply constantly being used by organisms? (1 point)
No, some is stored in Earth’s only carbon sink, the atmosphere.
No, some is stored in Earth’s carbon sinks, such as the oceans.
Yes, and it is used up as soon as it is formed.
Yes, and it briefly passes through the atmosphere as it cycles between organisms.
A) Which of these is the largest living carbon sink? (1 point)
soil
ocean
forests
insects

Answer 1

Q1: No, some is stored in Earth’s carbon sinks, such as the oceans.
(Only a portion is in the atmosphere; large amounts are stored in sinks like the oceans, soils, and rock/biomass.)

Q2: forests.
(Among living biomass, forests hold the most carbon. The ocean is the largest overall carbon sink but much of that carbon is nonliving/dissolved.)