Which of the following statements is correct?

• A

  Horsetails are gymnosperms
• B

  Selaginella is heterosporous, while Salvinia is homosporous
• Correct answer
  C

  Ovules are not enclosed by ovary wall in gymnosperms
• D

  Stems are usually unbranched in both Cycas and Cedrus

Solution

Gymnosperms are seed-bearing vascular plants, such as cycads, ginkgo, yews, and conifers, in which the ovules or seeds are not enclosed in an ovary.

Hence, the correct answer is option: 'C'.