Synchrony between the maturity of sexes and release of large number of gametes is shown by

Options

A. All spermatophytes
B. All bryophytes
C. Most of the algae
D. Most of the land plants

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about organisms that exhibit synchrony between the maturity of sexes and the release of a large number of gametes. This is typically associated with external fertilization.

2. **Defining External Fertilization**: External fertilization occurs when the male and female gametes fuse outside the body of the organisms. This is common in aquatic environments where gametes can be released into the water.

3. **Analyzing the Options**:
- **Option A: All Spermatophytes**: Spermatophytes include angiosperms and gymnosperms, which reproduce through internal fertilization. Therefore, this option is incorrect.
- **Option B: All Bryophytes**: Bryophytes also typically undergo internal fertilization. Thus, this option is incorrect as well.
- **Option C: Most of the Algae**: Algae generally reproduce through external fertilization, where they release a large number of gametes into the water, making this option likely correct.
- **Option D: Most of the Land Plants**: Land plants usually reproduce through internal fertilization, making this option incorrect.

4. **Conclusion**: Based on the analysis, the correct answer is **Option C: Most of the Algae**, as they demonstrate synchrony between the maturity of sexes and the release of a large number of gametes.