Most of the species that are yet undiscovered are probably

Options

A. mammals and reptiles
B. birds and fish
C. fungi
D. invertebrates

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about the types of species that are likely to remain undiscovered.

2. **Understand Biodiversity**: Recognize that biodiversity includes a wide variety of organisms, including mammals, reptiles, birds, fish, fungi, and invertebrates.

3. **Focus on Invertebrates**: Among these groups, invertebrates are highlighted as having a significant number of undiscovered species. Invertebrates are organisms that lack a backbone and include a vast number of species.

4. **Statistics on Invertebrates**: It is noted that there are approximately 4 million insect species alone that have not been classified. This indicates that a large portion of undiscovered species is likely to be found within this group.

5. **Conclusion**: Based on the information provided, the most undiscovered species are probably invertebrates, particularly insects.

6. **Final Answer**: The correct option is invertebrates, as they represent a significant percentage of undiscovered species.

---