A seed which does not require oxygen for germination is

Options

A. Pea
B. Rice
C. Typha
D. Both (2) and (3)

Answer

To answer the question "A seed which does not require oxygen for germination is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand Germination**: Germination is the process where a seed develops into a new plant. This process typically requires certain conditions, including oxygen for respiration.

2. **Identify Seed Structure**: A seed consists of an embryo, which is protected by a seed coat. The embryo has two main parts: the embryonal axis and cotyledons. Cotyledons serve as food reserves for the growing embryo.

3. **Conditions for Germination**: The three primary conditions necessary for seed germination are:
- Oxygen (for respiration)
- Water (for imbibition)
- Temperature (suitable for growth)

4. **Focus on the Question**: The question specifically asks for a seed that does not require oxygen for germination. This is unusual, as most seeds need oxygen.

5. **Consider Aquatic Plants**: Some seeds, particularly those from aquatic plants, can germinate without oxygen because they are submerged in water. In such environments, oxygen is not available in the same way it is for terrestrial seeds.

6. **Examples of Such Seeds**: Common examples of seeds that can germinate without oxygen include:
- Rice (Oryza sativa)
- Certain types of aquatic plants like Tifa (Typha).

7. **Conclusion**: Based on the understanding that aquatic seeds can germinate without oxygen, the answer to the question is that seeds such as rice and Tifa do not require oxygen for germination.

### Final Answer:
A seed which does not require oxygen for germination is rice and Tifa.

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