The life cycle of non-vascular plants includes alternation of generations between the following:

Options

A. A diploid sporophyte and a diploid gametophyte
B. A haploid sporophyte and a haploid gametophyte
C. A diploid sporophyte and a haploid gametophyte
D. A haploid sporophyte and a diploid gametophyte

Answer

**Step-by-Step Solution:**

1. **Understanding Non-Vascular Plants**: Non-vascular plants, such as bryophytes, do not have vascular tissues (xylem and phloem). They primarily include mosses, liverworts, and hornworts.

2. **Identifying the Dominant Phase**: In the life cycle of bryophytes, the dominant phase is the gametophyte, which is haploid (n). This means that the main plant body is made up of cells with a single set of chromosomes.

3. **Life Cycle Overview**: The life cycle of non-vascular plants involves two main phases: the haploid gametophyte and the diploid sporophyte.

4. **Sporophyte Formation**: The sporophyte is formed from the fertilization of gametes. This phase is diploid (2n) and results from the fusion of male and female gametes during fertilization (syngamy).

5. **Meiosis and Spores**: The diploid sporophyte undergoes meiosis to produce haploid spores. These spores are released and can germinate to form new gametophytes.

6. **Gametogenesis**: The gametophyte produces gametes through a process called gametogenesis. Male and female gametes are formed, which can then fertilize to form a zygote.

7. **Conclusion**: The life cycle of non-vascular plants alternates between the haploid gametophyte and the diploid sporophyte. Therefore, the correct answer to the question is that the life cycle includes the alternation of generations between the diploid sporophyte and the haploid gametophyte.

**Final Answer**: The life cycle of non-vascular plants includes alternation of generations between the diploid sporophyte and the haploid gametophyte.

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