Many algae such as volvox, spirogyara and some species of Chlamydomonas represent____pattern of life cycle.

Answer

To answer the question regarding the life cycle pattern represented by algae such as Volvox, Spirogyra, and some species of Chlamydomonas, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**: Recognize that Volvox, Spirogyra, and Chlamydomonas are all types of green algae belonging to the phylum Chlorophyta.

2. **Understand the Characteristics**: These algae are characterized by their ability to perform photosynthesis due to the presence of chlorophyll A and B.

3. **Examine the Reproductive Modes**: Investigate the reproductive strategies of these algae. They exhibit both asexual and sexual reproduction.

4. **Define the Life Cycle Pattern**: The life cycle pattern that these algae follow is termed "haplontic." In a haplontic life cycle, the dominant phase is haploid, meaning that most of the life cycle is spent in the haploid state.

5. **Illustrate the Life Cycle**: In the case of Chlamydomonas:
- It produces motile cells that undergo cell division to form zoospores.
- These zoospores develop into mature Chlamydomonas.
- The mature cells can produce gametes, which are also haploid.
- Upon fertilization (syngamy), a diploid zygote is formed.
- The zygote undergoes meiosis to produce haploid spores, completing the cycle.

6. **Conclude the Answer**: Based on the analysis, the answer to the question is that these algae represent a "haplontic" pattern of life cycle.

### Final Answer:
Many algae such as Volvox, Spirogyra, and some species of Chlamydomonas represent a **haplontic** pattern of life cycle.

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