Vestigial organs in the organisms of one species are non-functional in the organisms of all the other species.

Explanation

### Step-by-Step Solution:

1. **Understanding Vestigial Organs**:
- Vestigial organs are parts of an organism that have lost most or all of their original function through the course of evolution. Examples include the human appendix, wisdom teeth, and the remnants of hind limbs in whales.

2. **Analyzing the Statement**:
- The statement claims that vestigial organs in one species are non-functional in all other species. This implies that if an organ is vestigial in one species, it must be vestigial in all species.

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