Eduprobe
Question:
Which of the following statements is correct?
Stems are usually unbranched in both cycas and cedrus
Horsetails are gymnosperms.
Ovules are not enclosed by ovary wall in gymnosperms.
Selaginella is heterosporous, while Salvinia is homosporous
Solution:
Horsetails are seedless vascular plants that reproduce with spores and are found in moist environments. They are Pteridophyes. In gymnosperms, ovules are not enclosed by an ovary wall. In cycas, the stem is erect, stout and unbranched. However, in Pinus and Cedrus, the stem is branched. Selaginella and Salvinia are heterosporous. They have spores of two different sizes, microspores and megaspores. Thus, the correct answer is option C.