which of the following in correct regarding respiration in adult frog ?

Options

A. In water - skin and gills
B. On land -skin and buccal cavity
C. In water - skin and buccal cavity
D. On land - skin , lungs and gills

Answer

To solve the question regarding respiration in adult frogs, we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Frog Respiration**: Adult frogs have a unique respiratory system that allows them to breathe both in water and on land. They primarily use their skin and lungs for respiration.

2. **Evaluating the Options**:
- **Option 1**: "In water, skin and gills."
- This option is incorrect because adult frogs lose their gills as they mature. They do not use gills for respiration.

- **Option 2**: "On land, skin and buccal cavity."
- This option is correct. Adult frogs respire through their moist skin (cutaneous respiration) and their buccal cavity (buccopharyngeal respiration) when they are on land.

- **Option 3**: "In water, skin and buccal cavity."
- This option is incorrect because while frogs can use their skin for respiration in water, they do not utilize the buccal cavity in the same way as they do on land.

- **Option 4**: "Online, skin, lungs, and gills."
- This option is also incorrect. Adult frogs do not have gills; they rely on their skin and lungs for respiration.

3. **Conclusion**: Based on the evaluation of each option, the correct answer regarding respiration in adult frogs is **Option 2: On land, skin and buccal cavity**.