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Well I'm no expert on the subject, but castles usually had thick walls to try prevent enemies from breaking the wall down to intrude the castle.
Stone castles were built in 1277 and usually had more that one wall, the inner wall being higher than the outer ones.
The thick outer layer of a plant cell is called the cell wall... 8) A.I
It depends on the plane in question. On average, its about 2 pennies thick or less.
The cell wall
A couple of meters thick.
Plant cells have an extra thick outer covering called a cell wall, which provides structural support to the cell and protects it from mechanical damage. The cell wall is made up of cellulose fibers, which give it strength and rigidity.
the cell wall is a rigid outer layer unique to plant cells. it shapes and protects the cell, unlike animal cells, whose outer most layer is the plasma membrane (a layer that lies beneath the cell wall in plant cells)
Wood mainly. Just an outer wall with an entrance and a small fort inside. This type of castle would have been called a motte and bailey castle. Motte and bailey castles were later replaced by concentric castles made out of stone.
It varied depending on the castle, and the height of the wall. Some were 2-3 feet thick, some 20 feet.
two thick layers; one outer one allows for vessels to stretch and recoil
A diploid zygote with a thick protective wall suggests the zygote has undergone fertilization and is preparing for development. The thick protective wall, likely the zygote's outer layer, could provide physical protection and support as the embryo develops. This protective wall may function in maintaining internal conditions suitable for growth and development.