I would guess that the answer would be :'<span>These organisms dig more shallow burrows than they used to.</span>' If the crabs actively dig burrows, as many crab species do, and a layer of oil has persisted in the lower soil strata, it makes sense that the crabs would be reducing the depths of their burrows to avoid contact with the oil. The other possibility is that the crabs might might migrate to deeper waters, but this is less likely because the crabs would be evolved to utilise the intertidal zone.
As molten rocks cool gases such as nitrogen water vapor and carbon dioxide are released
It's the cell, can't you tell
the cell membrane acting like a bouncer at a club door
certain allowed in while others are ignored
the nucleus is the center of them all
it is the brain of the cell which leaves it no choice but to always be on the ball
the mitochondria work hard to produce atp
it allows us humans to run around at free
next comes the vacuoles the storage center
items important are only allowed to enter
