Select the correct statement

Options

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

Answer

To solve the question, we need to evaluate each statement provided and determine which one is correct. Here’s a step-by-step breakdown:

### Step 1: Analyze the first statement
**Statement:** "The leaves of gymnosperms are not well adapted to extreme climates."
- **Evaluation:** This statement is false. Gymnosperms, such as conifers, are primarily found in colder regions and are well adapted to extreme climates, particularly cold and dry environments.

### Step 2: Analyze the second statement
**Statement:** "Gymnosperms are both homosporous and heterosporous."
- **Evaluation:** This statement is also false. Gymnosperms are exclusively heterosporous, meaning they produce two types of spores: microspores (pollen) and megaspores (ovules).

### Step 3: Analyze the third statement
**Statement:** "Salvinia, Ginkgo, and Pinus all are gymnosperms."
- **Evaluation:** This statement is false. Salvinia is a type of Pteridophyte (a fern), while Ginkgo and Pinus are indeed gymnosperms. Therefore, this statement is incorrect because it incorrectly categorizes Salvinia.

### Step 4: Analyze the fourth statement
**Statement:** "Sequoia is one of the tallest trees."
- **Evaluation:** This statement is true. Sequoia, also known as the Redwood tree, is recognized as one of the tallest tree species in the world.

### Conclusion
After evaluating all the statements, the only correct statement is: **"Sequoia is one of the tallest trees."**

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