For landscapes, the main tradeoff is image quality and aperture versus flexibility.

A wide-angle zoom is usually the more practical choice on a D7000. At very short focal lengths, even a 1mm change can noticeably affect composition, so zooming is very useful. On APS-C, truly wide and ultrawide focal lengths are also more commonly available as zooms than as primes.

A prime’s advantages are typically a larger maximum aperture, lower geometric distortion, and often better overall image quality. The downside is that you lose framing flexibility, which matters a lot with wide scenes.

Zooms are more versatile: you can reframe quickly, isolate part of a landscape, or react if you suddenly want a tighter view. Their common drawbacks are smaller maximum apertures and often more distortion at the wide end.

For static subjects like landscapes, another option is using a longer lens and stitching multiple frames for very high resolution panoramas. But that’s a different workflow and not a replacement for an ultrawide when you need a single very wide field of view.

In short: if convenience and composition flexibility matter most, choose a wide-angle zoom. If you prioritize maximum aperture and optical quality and are happy working at one focal length, a prime can be excellent.