Choose the correct pair.

Options

A. Coconut, cucurbits - dioecious
B. Honeybee, Rotifers-parthenogensis
C. Ornithorhynchus, Whale - viviparity
D. Frog, Peacock - external fertilisation

Answer

To solve the question "Choose the correct pair," we need to analyze each option provided and determine whether the pairs are correctly matched based on their biological characteristics.

### Step-by-Step Solution:

1. **Examine the first option: Coconut and Cooker Beets matched with Dioecious.**
- **Analysis:**
- Coconut (Cocos nucifera) is a monoecious plant, meaning it has both male and female reproductive structures on the same individual.
- Cooker Beets (Beta vulgaris) can be monoecious or dioecious depending on the variety, but typically they are considered monoecious as well.
- **Conclusion:** This option is incorrect.

2. **Examine the second option: Honey Bee matched with Parthenogenesis.**
- **Analysis:**
- In honey bee colonies, fertilized eggs develop into females (workers or queens), while unfertilized eggs develop into males (drones) through a process called parthenogenesis.
- **Conclusion:** This option is correct.

3. **Examine the third option: Ornithorhynchus (Platypus) matched with Oviparity.**
- **Analysis:**
- Ornithorhynchus, commonly known as the platypus, is a mammal that lays eggs, which is a characteristic of oviparity. However, it is an exception among mammals as most mammals give live birth.
- **Conclusion:** While technically correct, the pairing is misleading as it does not represent the typical reproductive strategy of mammals.

4. **Examine the fourth option: Frog and Peacock matched with External Fertilization.**
- **Analysis:**
- Frogs typically exhibit external fertilization, where eggs and sperm are released into the water for fertilization.
- However, peacocks (Pavo cristatus) reproduce through internal fertilization, where the male fertilizes the eggs inside the female.
- **Conclusion:** This option is incorrect.

### Final Answer:
The correct pair is **Honey Bee and Parthenogenesis**.