Question

which characteristic do ginkgoes and cycads have in common?
are usually evergreen
lived during the time of dinosaurs
produce football - sized cones
have a shallow root system

Explanation:

Ginkgoes and cycads are both ancient plant groups. Fossil records show that they existed during the Mesozoic era when dinosaurs roamed the Earth. Ginkgoes are deciduous (lose leaves in autumn), so they are not usually evergreen. Only some cycads produce large cones, not ginkgoes. Ginkgoes have a deep root system in many cases, not a shallow one.

Answer:

lived during the time of dinosaurs