Pituitary gland is crushed and injected in Frog. Frog will

Options

A. Start laying eggs almost immediately
B. Change colour
C. Undergo metamorphosis
D. Die.

Answer

### Step-by-Step Solution:

1. **Understanding the Role of the Pituitary Gland**:
- The pituitary gland is a crucial endocrine gland that regulates various bodily functions, including hormone production. It influences the thyroid gland, which is responsible for producing thyroid hormones.

2. **Identifying the Effects of Thyroid Hormones**:
- Thyroid hormones, particularly thyroxine, play a significant role in the metamorphosis of frogs. Metamorphosis is the process where a tadpole transforms into an adult frog, involving significant changes in appearance and physiology.

3. **Impact of Crushing the Pituitary Gland**:
- If the pituitary gland is crushed, its ability to produce and release hormones is compromised. This would lead to a decrease in the synthesis of thyroid hormones, which are essential for normal metamorphosis.

4. **Understanding Chromatophores**:
- Chromatophores are pigment-containing cells that contribute to the coloration of the frog's skin. They are influenced by hormones released from the pituitary gland.

5. **Resulting Changes in the Frog**:
- With the pituitary gland crushed, the hormonal balance is disrupted, affecting the chromatophores. This disruption leads to a pale coloration in the frog due to the lack of stimulation of these pigment cells.

6. **Conclusion**:
- Therefore, if the pituitary gland is crushed and injected into the frog, the frog will exhibit a change in coloration, specifically a pale appearance.

### Final Answer:
The frog will exhibit a change in color, resulting in pale coloration.

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