Biologic evolution

It is swallowtail butterfly's larva's excrement.
It puts in the cup, the water ten milliliters are put, and salinity
is measured.
There might have been a lot of water ten milliliters because there
was no amount of Fn ..becoming empty...
The leaf had been measured before it was eaten.
Water ten liters per two leaf
The salinity measurement was 0.6g/100g.