Two plants can be conclusively said to belong to the same species if they

Options

A. Have same number of chromosomes
B. Can reproduce freely with each other and form seeds
C. Have more than 90 percent similar genes
D. Look similar and possess identical secondary metabolites

Answer

To determine if two plants belong to the same species, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Species Definition**: A species is generally defined as a group of organisms that can interbreed and produce fertile offspring. This is a foundational concept in biology.

2. **Chromosome Number**: While having the same number of chromosomes can indicate that two plants are closely related, it is not a definitive criterion for species classification. Different species can sometimes have the same chromosome number.

3. **Reproductive Compatibility**: The most conclusive criterion is that two plants can reproduce freely with each other and form viable seeds. This means that when they are cross-pollinated, they can produce offspring that can also reproduce. This is a key indicator of belonging to the same species.

4. **Genetic Similarity**: Having more than 90% similar genes can also suggest that two plants are closely related, but again, it is not definitive on its own. Different species can share a high percentage of genetic material.

5. **Morphological Similarity**: While looking similar and possessing identical secondary metabolites can indicate that two plants are related, it is not a definitive criterion for species classification. Morphological traits can be influenced by environmental factors.

6. **Conclusion**: Therefore, the most conclusive criterion for determining if two plants belong to the same species is their ability to reproduce freely with each other and produce fertile seeds.

### Final Answer:
Two plants can be conclusively said to belong to the same species if they can reproduce freely with each other and form seeds.

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