Select the correct statement :

Options

A. Gymnosperm are both homosporous and het- erosporous
B. Salvinia, Ginkgo and Pinus all are gymnosperms
C. Sequoia in one of the tallest trees
D. The leaves of gymnosperms are not well adapted to extremes of climate

Answer

To solve the question "Select the correct statement," we need to analyze each of the provided statements about gymnosperms and related plants. Let's break down the statements one by one:

1. **Statement 1: Gymnosperms are both homosporous and heterosporous.**
- Gymnosperms are actually heterosporous, meaning they produce two different types of spores: microspores (male) and megaspores (female). Therefore, this statement is incorrect.

2. **Statement 2: Salvenia, Ginkgo, and Pinus are all gymnosperms.**
- Ginkgo and Pinus are indeed gymnosperms, but Salvenia is not; it is an angiosperm (flowering plant). Thus, this statement is also incorrect.

3. **Statement 3: Sequoia is the tallest tree.**
- This statement is correct. Sequoia trees, particularly the coast redwoods (Sequoiadendron giganteum), are known to be among the tallest trees in the world.

4. **Statement 4: The leaves of gymnosperms are not well adapted to extremities of climate.**
- This statement is incorrect. The leaves of gymnosperms, such as needle-like leaves, are well adapted to withstand extreme climatic conditions, including drought and cold.

Based on this analysis, the correct statement is:

**Correct Answer: Statement 3 - Sequoia is the tallest tree.**