Choose the incorrect statement about gymnosperms.

Options

A. The cones bearing megasporphylls with ovules or megsporangia are called female strobili .
B. In gymnosperms , the male and the female gametophytes do not have an independent free - living existence.
C. The gymnosperms are homosporous in nature .
D. One of the gymnosperms, the giant redwood tree Sequoia is one of the tallest tree species.

Answer

To solve the question about gymnosperms and identify the incorrect statement, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Gymnosperms**:
Gymnosperms are a group of seed-producing plants that includes conifers, cycads, Ginkgo, and gnetophytes. They are characterized by having seeds that are not enclosed in an ovary (unlike angiosperms).

2. **Analyzing Option A**:
- Statement: "The conspiring megasporophylls with ovules and megasporangia are called female strobili."
- Explanation: This statement is correct. In gymnosperms, the female reproductive structures (strobili) contain megasporophylls, which bear ovules and megasporangia.

3. **Analyzing Option B**:
- Statement: "In gymnosperms, the male and female gametophytes do not have an independent living existence."
- Explanation: This statement is also correct. In gymnosperms, both male and female gametophytes develop within the sporangia and do not exist independently.

4. **Analyzing Option C**:
- Statement: "The gymnosperms are homosporous in nature."
- Explanation: This statement is incorrect. Gymnosperms are heterosporous, meaning they produce two types of spores: microspores (male) and megaspores (female).

5. **Analyzing Option D**:
- Statement: "One of the gymnosperms, the giant redwood tree sequoia is one of the tallest tree species."
- Explanation: This statement is correct. The giant sequoia (Sequoiadendron giganteum) is indeed one of the tallest tree species in the world.

### Conclusion:
Based on the analysis, the incorrect statement about gymnosperms is **Option C**: "The gymnosperms are homosporous in nature."

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