Landscape and Still Life paintings or drawings are important to have in your art portfolio, but they don’t have to be straight forward. You can show your originality and your own style and interests like here- where she’s using a consistent color palette throughout her portfolio, and adding elements that are surreal/abstracted, also consistent with the rest of her portfolio
This is a great example of an outstanding landscape portfolio piece & below is a great example of an outstanding still life portfolio piece 
Ashcan Art Blog 