Other biochemical markers such as mean corpuscular volume, platelet count, liver enzymes, gamma-glutamyltransferase.
Mean corpuscular volume and liver enzymes are both biochemical markers.
Liver enzymes cannot be considered a biochemical marker.
A person doing tricks on a bike.
the family is in the car
People standing in a field
An arena where baseball is being played.
a woman is drinking outside
I had many other choices, apart from seeing the Carlsbad Caverns.