Ectoderm
if you are think sand would be a layer yes mars is covered with red sand
Its Three. Which are: Physical, Data Link and Network Layers
s it true that the earths surface is covered by a continuous layer of solid rock?
Australia is not completely covered.. There is ozone hole there.
They did not bathe until many layer of dirt covered their bodies
Viper's are covered with an outer layer of scales.
uranus
the ozone!!
cos it is
It was very dry and there was many dust storms that covered the land, and etc with a think layer of dirt.
A surface covered with one layer of compactly arranged tall cells would be a layer of simple columnar epithelium. This is commonly found in the GI tract.