The color of leaves on deciduous trees usually changes in the autumn season, and douglas Fir trees have fir cones. Given these facts, what non-deciduos types do not change colors among the following options:
- Conifers
 - Frogs
 - eukyarotes
 - Echinoids
 - monotremes
 - opossums
 - ferns
 - heterotrophs


 

 Conifers        