from plants....
fiber derived from plants or animals are called natural fibers
fiber is cellulose which is found in the cell walls of plants.
No, you get more fiber from raw plants.
True.
flax plants
Flax plants were a source of linen fiber before the Industrial Revolution.
Dietary fiber is from cellulose, only manufactured by plants. Insoluble fibers are also only in plants.
No, milk is not high in fiber. Fiber comes from plants, specifically the parts of the plants that we cannot digest. Soymilk contains fiber. However, to get a lot of fiber you should eat vegetables, certain fruits, and grains such as peas, beans, prunes, oats, barley, and flax seeds.
fiber
I do not recall it having one, but if it does it is a simple fiber gasket and slips over the cap flanges.
I'm not sure what you are asking, since raw silk is a fiber which is obtained from the cocoons of silkworms, but a fiber obtained from plants would be something like cotton, though there are others, too.