Which of the following statements is correct?
(a) Ovules are not enclosed by ovary wall in
gymnosperms.
(b) Selaginella is heterosporous, while Salvinia is
homosporous.
(c) Horsetails are gymnosperms.
(d) Stems are usually unbranched in both Cycas and
Cedrus.
(a) Ovules are not enclosed by ovary wall in
gymnosperms.
(b) Selaginella is heterosporous, while Salvinia is
homosporous.
(c) Horsetails are gymnosperms.
(d) Stems are usually unbranched in both Cycas and
Cedrus.