In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?
A. Spheospsida
B. Filicineae
C. Gymnosperms
D. Angiosperms
In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?
A. Spheospsida
B. Filicineae
C. Gymnosperms
D. Angiosperms