Seed is not morphologically equivalent to spore because

Options

A. Spore is not produced through fertilization
B. Spore does not possess embryo & endosperm
C. Spore is a haploid structure
D. All the above

Answer

To answer the question "Seed is not morphologically equivalent to spore because," we can break down the reasoning into several steps:

### Step-by-Step Solution:

1. **Definition of Seed and Spore**:
- A **seed** is a fertilized ovule that contains the embryo and is capable of developing into a new plant. It is produced after fertilization.
- A **spore**, on the other hand, is a reproductive unit that can develop into an organism without fusion with another reproductive unit. It is typically produced through asexual reproduction.

2. **Production Process**:
- Seeds are formed through the process of **fertilization**, where the male and female gametes fuse to form a zygote, which then develops into a seed.
- Spores are produced through **asexual reproduction** or meiosis and do not involve fertilization.

3. **Structural Composition**:
- Seeds contain an **embryo** (the young plant) and often have **endosperm** (nutritive tissue that supports the developing embryo).
- Spores do not contain these structures; they are simply a single cell that can grow into a new organism.

4. **Ploidy Level**:
- Seeds are typically **diploid** (2n), meaning they contain two sets of chromosomes, one from each parent.
- Spores are usually **haploid** (n), meaning they contain only one set of chromosomes.

5. **Conclusion**:
- Because seeds are produced through fertilization, contain an embryo and endosperm, and are diploid, while spores are produced asexually, lack these structures, and are haploid, seeds and spores are not morphologically equivalent.

### Final Answer:
The correct reason why a seed is not morphologically equivalent to a spore is: **All of the above** (spores are not produced through fertilization, do not possess an embryo and endosperm, and are haploid structures).