The reduced or rudimentary and non functional organs in the organisms are known

Options

A. Homologous organs
B. Analogous organs
C. Vestigial organs
D. Atavistic organs

Answer

**Step-by-step Solution:**

1. **Understanding the Question**: The question asks for the term used to describe reduced or rudimentary organs in organisms that are non-functional.

2. **Identifying the Concept**: In evolutionary biology, certain organs may lose their original function over time due to changes in the organism's lifestyle or environment. These organs are remnants of structures that were once functional in ancestral species.

3. **Defining the Term**: The term used to describe these non-functional organs is "vestigial organs." Vestigial organs are those that have diminished in size and function compared to their ancestral forms.

4. **Examples of Vestigial Organs**: Examples include the hind limb bones in pythons and the pelvic bones in whales. These structures are present but serve no significant purpose in the current species.

5. **Differentiating from Other Terms**: It is important to differentiate vestigial organs from homologous and analogous organs:
- **Homologous organs**: Organs that have a similar structure but may serve different functions across different species.
- **Analogous organs**: Organs that serve similar functions but have different structural origins.

6. **Conclusion**: Therefore, the correct answer to the question is "vestigial organs."

**Final Answer**: The reduced or rudimentary and non-functional organs in organisms are known as **vestigial organs**.

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