Which of the following organisms do(es). Not exhibit internal budding? (a) Yeast (b) Sycon (c)Spongilla (d) Hydra

Options

A. b & d
B. a & d
C. b & c
D. Only d

Answer

To solve the question of which organism does not exhibit internal budding, we will analyze each option provided:

1. **Understanding Internal Budding**:
- Internal budding is a form of asexual reproduction where a bud forms within the parent organism and eventually detaches to become a new individual.

2. **Analyzing Each Option**:
- **(a) Yeast**: Yeast is known to reproduce asexually through a process called budding. In this process, a small bud forms on the parent cell and eventually detaches. Therefore, yeast does exhibit internal budding.

- **(b) Sycon**: Sycon, a type of sponge, reproduces asexually through external budding, where buds grow on the outside of the parent organism. Thus, Sycon does not exhibit internal budding.

- **(c) Spongilla**: Similar to Sycon, Spongilla (another type of freshwater sponge) also reproduces by external budding. Hence, Spongilla does not exhibit internal budding either.

- **(d) Hydra**: Hydra is known for its ability to reproduce asexually through internal budding, where buds form on the body of the parent and eventually detach.

3. **Conclusion**:
- From the analysis, we can conclude that both Sycon and Spongilla do not exhibit internal budding. Therefore, the correct answer to the question is **(b) Sycon and (c) Spongilla**.

### Final Answer:
The organisms that do not exhibit internal budding are **(b) Sycon** and **(c) Spongilla**.