True, reddish-yellowish color on pH paper shows acidity
Population bottlenecks. but their genes still carry the marks of this bottleneck: they have much less genetic variation than a population of southern elephant seals that was not so intensely hunted.
Answer:
I know you only need two, but here:
--Subsidence and sinkholes.
--Sinkholes and caverns.
--Waterfalls and rapids.
--Deltas and levees.
--Erosion and abrasion.
Explanation:
No because we keep putting it into the earth also decomposing animals give off carbon.
