Parthenogenesis is found in
a. Platyhelminthes b. Rotifers c. some annelids d. Honeybees e. some lizards f. cephalochordates g. Turkey birds

Options

A. a, b, c and f
B. d, e and g
C. a, b, c and d
D. b, d, e and g

Answer

To determine which organisms exhibit parthenogenesis, we need to analyze the given options based on the definition and characteristics of parthenogenesis.

### Step-by-Step Solution:

1. **Understand Parthenogenesis**:
- Parthenogenesis is a form of asexual reproduction where an egg develops into an organism without fertilization. This means that the offspring arise from the female gamete alone.

2. **Analyze Each Option**:
- **a. Platyhelminthes**: These are flatworms that can reproduce both sexually and asexually, but parthenogenesis is not a common method of reproduction in this group.
- **b. Rotifers**: Some species of rotifers reproduce via parthenogenesis, making this a valid option.
- **c. Some annelids**: While some annelids can reproduce asexually, parthenogenesis is not widely recognized in this group.
- **d. Honeybees**: In honeybees, unfertilized eggs develop into males (drones) through parthenogenesis, which is a clear example of this reproductive method.
- **e. Some lizards**: Certain species of lizards can reproduce through parthenogenesis, making this a valid option as well.
- **f. Cephalochordates**: These organisms primarily reproduce sexually, and parthenogenesis is not a characteristic of this group.
- **g. Turkey birds**: Some turkey species can reproduce via parthenogenesis, making this another valid option.

3. **Conclusion**:
- The organisms that exhibit parthenogenesis from the options provided are:
- **b. Rotifers**
- **d. Honeybees**
- **e. Some lizards**
- **g. Turkey birds**

4. **Final Answer**:
- The correct options for organisms that exhibit parthenogenesis are **b, d, e, and g**.