Desert Biome!

[swimchamp101]

What is the topography of the land? (examples: mountains, plains, hills, valleys plateaus)

I know that all deserts have a lot of different topographies but are there like deserts in specific locations that have topographies based on that?

I need like general topographies for this biome but when I try to research I'm not really finding anything. I need to like present this and I'm having trouble trying to figure out what to say about the topography. I could just say that these deserts have these topographies but I think I should make a general statement.

Also, what are typical climax community vegetation highlighting plant adaptations which enable plants to survive in the biome (cite at least three examples)?

[JackBean]

adaptation: vax on surface, CAM metabolism, fast life time, seeds able to survive for very long time, untill next rain (even decades)

[jwalin]

have sunken stomata
rolled up leaves
usually have thorns instead of leaves
have a waxy cuticle
have hairy leaves
long roots that spread over a large diameter and go down to great depths