its not too descriptive.
ni hard material lubrication is required or not
Inside the protein part... The genetic material is sorrounded by the protein :):)
A brittle material fractures without haven a large strain on beforehand. Examples are most ceramics, of extremely hard steel. The opposite is ductile.
insulation
The hereditary material in a cell is deoxyribnucleaic acid (DNA).
Enamel
The hard material on the outside of your teeth is called enamel. Eating lemons can remove the enamel, and you don't want to do that.
dentin
Molten material below ground is called magma, and molten material above ground is called lava.
The leather will not damage the outside of a laptop it is designed too protect your laptop from damage.
WHEN MALTEN MATERIALS ARE INSIDE THE VOLCANOES ITS CALLED MAGMA WHEN IT IS OUTSIDE THE VOLCANOES ITS CALLED LAVA
it's called a cite
Cytoplasm
Extracellular material is found outside of the cell.
Coral reef
chicken eggs are a see through material inside unlike the outside;it's hard shell.
Spiders.