NEET Solved Paper 2018 Question 40
Question: Which of the following statements is correct? [NEET - 2018]
Options:
A) Horsetails are gymnosperms
B) Selaginella is heterosporous, while Salvinia is homosporous
C) Ovules are not enclosed by ovary wall in gymnosperms
D) Stems are usually unbranched in both Cycas and Cedrus
Show Answer
Answer:
Correct Answer: C
Solution:
- Gymnosperms are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes. In gymnosperms, the ovules are exposed on the surface of cone scales or other structures and are not enclosed within an ovary, unlike in angiosperms where the ovules are enclosed within an ovary.
- Horsetails are not gymnosperms; they belong to the group of pteridophytes.
- Selaginella is indeed heterosporous, producing two types of spores (megaspores and microspores), but Salvinia is also heterosporous, not homosporous.
- Cycas typically has unbranched stems, but Cedrus (cedar) usually has branched stems.