The coal that humans use today was mostly formed by vast swamps of
a. angiosperms
b. gymnosperms
c. seedless vascular plants
d. mosses
e. liverworts
Answer: c. seedless vascular plants
The coal that humans use today was mostly formed by vast swamps of
a. angiosperms
b. gymnosperms
c. seedless vascular plants
d. mosses
e. liverworts
Answer: c. seedless vascular plants