The correct sequence of passage of male gametes in frog is 

Options

A. seminiferous tubules - bidders canal - ureter - transverse canal - cloaca
B. seminiferous tubules - vas efferentia - ureters - bladders canal - transverse canal - cloaca
C. seminiferous tubules - bidders canal - transverse canal - cloaca - ureters
D. seminiferous tubules - vas efferentia - bidder's canal - transverse canals - ureters - cloaca

Answer

To determine the correct sequence of passage of male gametes in frogs, we need to understand the anatomical structures involved in the reproductive system of frogs and the pathway that sperm takes from production to release. Here’s a step-by-step breakdown of the process:

### Step-by-Step Solution:

1. **Spermatogenesis in Seminiferous Tubules**:
- The process begins in the **seminiferous tubules** located within the testes. This is where sperm cells (male gametes) are produced through a process called spermatogenesis.

2. **Transport to Vasa Deferens**:
- Once the sperm are produced, they move into the **vasa deferens**. This is a series of ductules (12 to 20) that transport the sperm from the seminiferous tubules to the next structure.

3. **Entry into Bidder's Canal**:
- The sperm then enter the **Bidder's canal**, which is located in the kidney of the frog. This canal receives the sperm from the vasa deferens.

4. **Movement to Transverse Canal**:
- After Bidder's canal, the sperm move into the **transverse canal**. This canal serves as a pathway for the sperm to continue their journey.

5. **Ureter**:
- The next step involves the **ureter**, which in frogs acts as a urogenital duct. The ureter carries the sperm along with urine, facilitating the passage of sperm out of the body.

6. **Cloaca**:
- Finally, the sperm are expelled through the **cloaca**, which is a common opening for the urinary, reproductive, and digestive tracts in frogs. The cloaca serves as the exit point for the sperm.

### Correct Sequence:
The correct sequence of passage of male gametes in frogs is:
1. Seminiferous Tubules
2. Vasa Deferens
3. Bidder's Canal
4. Transverse Canal
5. Ureter
6. Cloaca

Thus, the correct answer is **Option D**.