Green algae are also included among the items carried by astronauts in a space ship Which of the following are the reasons for this?
1. These being very simple plants, are amenable to a variety of experiments. 2. These may provide nourishment to the persons on the space ship.
3. These act as a source of oxygen.
Select the correct answer using the codes given below.

Options

A. (a) 1,2 and 3
B. (b) 1 and 3
C. (c) 1 and 2
D. (d) 2 and 3

Answer

To solve the question regarding the inclusion of green algae in the items carried by astronauts in a spaceship, we will analyze each of the given statements one by one.

### Step-by-Step Solution:

1. **Evaluate Statement 1**:
- The first statement claims that green algae, being very simple plants, are amenable to a variety of experiments.
- Green algae are indeed simple organisms and are often used in scientific research due to their uncomplicated structure and rapid growth. They can be utilized in various experiments, including studies on photosynthesis and environmental responses.
- **Conclusion**: This statement is **true**.

2. **Evaluate Statement 2**:
- The second statement suggests that green algae may provide nourishment to the persons on the spaceship.
- Certain species of green algae, such as *Chlorella vulgaris*, are known for their high protein content and nutritional value. They can serve as a food supplement, potentially fulfilling a portion of the dietary needs of astronauts.
- **Conclusion**: This statement is **true**.

3. **Evaluate Statement 3**:
- The third statement indicates that green algae act as a source of oxygen.
- Green algae perform photosynthesis, which involves converting carbon dioxide into oxygen. This process can help maintain oxygen levels in a closed environment like a spaceship, making them a valuable resource for astronauts.
- **Conclusion**: This statement is **true**.

### Final Answer:
Since all three statements are correct, the correct answer is **A) 1, 2, and 3**.

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