Of the seven continents the only two close to being "mostly desert", with the definition of desert as an area of limited rainfall and, hence, little vegetation, are Australasia and Antarctica.
Antarctica and Australia.
none! There is ocean between the 2 continents
All continents have desert biomes, even Europe.
During the Permian, all the continents were joined together in the supercontinent Pangaea, which was covered mostly by desert.
All continents have deserts, including Europe which has some small desert areas.
the Sahara desert
There are no continents that do not have deserts. Even Europe has a small patch of desert in Spain - Las Tabernas Desert - and almost the entire continent of Antarctica is a desert.
There is no Sierra Desert. If you are referring to the Sahara Desert, it is in Africa.
All continents have named deserts. Antarctica has the Antarctic Desert. Even Europe has several small regional deserts and each has a name
North and South America are the only continents fully (and mostly) in the Western Hemisphere.
All continents have deserts. However, Europe has no major desert areas.
No, all continents have deserts. Even Europe has a small desert in Spain. Nearly the entire continent of Antarctica is considered a desert.