Some things are preserved because bacteria/virus etc. may develop or its quality will degrade if used after a long time while vice-versa is true of non-preserved foods.
Things that usually were not made of bone were not preserved. Although there are some like leaves and feathers that were. Also some that were found in amber are those that would not be preserved otherwise.
Canned, salted, frozen, pickled, dried.
A semi-permeable membrane.
It is not intrinsically better. For some things it may be, for others it won't.It is not intrinsically better. For some things it may be, for others it won't.It is not intrinsically better. For some things it may be, for others it won't.It is not intrinsically better. For some things it may be, for others it won't.
It is not known exactly as skin is not usually preserved in fossils. However in the cases where skin is preserved it is found to have varied between different types of dinosaur. Some had scales like modern reptiles while others, especially small theropods, had feathers and possibly birdlike skin.
Moscow is a very beautiful city, but some people might not like it, as some people like certain things while others like other things.
It's unequal; some people do well while others do not
why did some people fear monoplies while others supported them
why some have depressed navels while others have protruding navels.
Some things float or sink based on their density. Objects that are less dense than the liquid they are placed in will float, while those that are more dense will sink. Additionally, the shape and size of an object can also affect whether it floats or sinks.
Bookkeeping means different things to different people. Some view it as the same as accounting while others see it as record keeping.
The chimicals in some liquids burn others do not.