Foetus is the

Options

A. Well developed embryo
B. Developing embryo
C. A zygote
D. Male gamete

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- To answer the question, we need to define what a fetus is in the context of animal reproduction.

2. **Life Cycle of an Organism:**
- The life cycle begins with fertilization, where the male and female gametes (sperm and egg) unite to form a zygote.

3. **Formation of the Zygote:**
- The zygote is the initial single-celled entity formed after fertilization. It is not yet a fetus.

4. **Development into an Embryo:**
- The zygote undergoes multiple divisions and transformations to develop into an embryo. This stage is characterized by the early development of the organism.

5. **Transition to Fetus:**
- As the embryo continues to grow and develop, it eventually reaches a stage where it is considered a fetus. This stage is marked by more advanced development and the formation of organs and structures.

6. **Conclusion:**
- Therefore, a fetus is defined as a well-developed embryo. It is not merely a developing embryo or a zygote, and it certainly is not a male gamete.

7. **Final Answer:**
- The correct answer to the question "Foetus is the" is: **A) well developed embryo.**

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