Select the correct statement `:`

Options

A. Gymnosperms are both homosporous and heterosporous
B. Salvinia, Ginkgo and Pinus all are gymnosperms
C. Sequoia is one of the tallest trees
D. The leaves of gymnosperms are not well adapted to extremes of climate

Answer

To solve the question of selecting the correct statement regarding Gymnosperms, we will analyze each statement one by one:

1. **Statement 1: Gymnosperms are both homosporous and heterosporous.**
- Gymnosperms are primarily heterosporous, meaning they produce two different types of spores (microspores and megaspores). While some plants can be homosporous, Gymnosperms are not typically classified as such. Therefore, this statement is **incorrect**.

2. **Statement 2: Salvinia, Ginkgo, and others are Gymnosperms.**
- Salvinia is a genus of aquatic ferns and is classified under Pteridophytes, not Gymnosperms. Ginkgo, however, is a type of Gymnosperm. Since Salvinia is incorrectly included in this group, the statement is **incorrect**.

3. **Statement 3: Sequoia is one of the tallest trees.**
- This statement is true. Sequoia trees are indeed among the tallest trees in the world and belong to the Gymnosperm group. Therefore, this statement is **correct**.

4. **Statement 4: The leaves of Gymnosperms are not well adapted to extremes of climates.**
- This statement is false. Gymnosperms have needle-like leaves that are well adapted to withstand extreme temperatures and conditions, such as drought and cold. Thus, this statement is **incorrect**.

After analyzing all the statements, the correct answer is **Statement 3: Sequoia is one of the tallest trees.**