Sea Lettuce is

Options

A. Laminaria
B. Chlorella
C. Sargassum
D. Ulva.

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about "Sea Lettuce" and provides four options: a) Laminaria, b) Cholera, c) Sargassum, and d) Alva.

2. **Understand Sea Lettuce**: Sea Lettuce is a type of green algae. It is important to note that it belongs to the division Chlorophyta, which is known for its green algae.

3. **Physical Characteristics**: Sea Lettuce has lobed and ruffled-edged leaves, resembling the leaves of garden lettuce. This characteristic helps in identifying it as a type of green seaweed.

4. **Habitat**: Sea Lettuce is typically found in marine environments, often growing on rocks where there is an abundance of nutrients. This habitat is crucial for its growth and survival.

5. **Scientific Name**: The common name "Sea Lettuce" corresponds to the scientific name "Ulva lactuca." This is a key identification point.

6. **Life Cycle**: Sea Lettuce exhibits a life cycle that includes both sporangial (asexual) and gametangial (sexual) thalli, indicating that it undergoes alternation of generations.

7. **Choosing the Correct Option**: Based on the information gathered, the correct answer to the question "Sea Lettuce is" is option d) Alva (which refers to Ulva).

**Final Answer**: Sea Lettuce is d) Alva (Ulva lactuca).

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