Compared to a bull a bullock is docile because of

Options

A. higher levels of cortisone
B. lower levels of blood testosterone
C. lower levels of adrenalin/noradrenalin in its blood
D. higher levels of thyroxin

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- A bullock is a castrated male bovine, while a bull is an intact male. Castration involves the surgical removal of the testicles.

2. **Role of Testes:**
- The testes are responsible for producing testosterone, a hormone that plays a crucial role in the development of male secondary sexual characteristics, including aggression and dominance behaviors.

3. **Effect of Castration:**
- When a bull is castrated to become a bullock, the removal of the testes leads to a significant decrease in testosterone levels. This reduction in testosterone is linked to a decrease in aggressive behaviors.

4. **Defining Docility:**
- Docility refers to being less aggressive and easier to handle. In the context of livestock, docile animals are preferred for work and companionship.

5. **Analyzing the Options:**
- **A. Higher level of cortisone:** Incorrect. Cortisone is related to stress response and metabolism, not aggression.
- **B. Lower levels of blood testosterone:** Correct. The castration of the bullock results in lower testosterone levels, leading to increased docility.
- **C. Lower level of adrenaline or non-adrenaline:** Incorrect. These hormones are related to fight-or-flight responses and do not directly influence docility.
- **D. Higher level of thyroxine:** Incorrect. Thyroxine is related to metabolism and growth, not aggression or docility.

6. **Conclusion:**
- Therefore, the correct answer is that a bullock is more docile compared to a bull because of **lower levels of blood testosterone**.

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