Earthworms and frogs breathe through their skin because of which the skin of both the organisms is

Options

A. moist and rough
B. dry and rough
C. dry and slimy
D. moist and slimy

Answer

To answer the question about why earthworms and frogs can breathe through their skin, we need to analyze the characteristics of their skin. Here’s a step-by-step solution:

### Step 1: Understanding Skin Respiration
Both earthworms and frogs are capable of breathing through their skin, a process known as cutaneous respiration. This requires their skin to have specific properties.

**Hint:** Think about what is necessary for gas exchange to occur through the skin.

### Step 2: Characteristics of Earthworm Skin
The skin of an earthworm is thin and moist. This moistness is crucial because it allows oxygen to dissolve in the moisture and diffuse into the body. The thinness of the skin facilitates easy gas exchange.

**Hint:** Consider why moisture is important for the process of respiration through the skin.

### Step 3: Characteristics of Frog Skin
Frogs also have moist skin, which aids in respiration. While frogs have lungs for breathing air, they can also absorb oxygen and expel carbon dioxide through their skin when it is moist. The skin of frogs is often described as slimy due to the presence of mucus, which helps keep the skin moist.

**Hint:** Reflect on how the environment (land and water) affects the skin of frogs.

### Step 4: Conclusion
Given that both organisms rely on their skin for respiration, and considering the properties of their skin, we conclude that the skin of both earthworms and frogs is moist and slimy.

**Final Answer:** The correct option is D: moist and slimy.