Cyst wall of Euglena is formed of

Options

A. Silica
B. Carbohydrate
C. Proteins
D. Calcium

Answer

To answer the question "Cyst wall of Euglena is formed of," we can follow these steps:

### Step 1: Understand the Structure of Euglena
Euglena is a unicellular organism that belongs to the kingdom Protista. It has a unique structure that allows it to survive in various environments.

**Hint:** Research the basic structure and components of Euglena to understand its adaptations.

### Step 2: Identify the Cyst Forming Conditions
Euglena can form cysts to protect itself during unfavorable environmental conditions, such as extreme temperatures or lack of nutrients.

**Hint:** Consider why organisms form cysts and what materials are typically used in their construction.

### Step 3: Examine the Composition of Cyst Walls
The cyst wall is a protective layer that encases the organism. In the case of Euglena, it is important to identify what materials are used to form this wall.

**Hint:** Look into the specific components that make up the cyst walls of various organisms, particularly Euglena.

### Step 4: Evaluate the Options Given
The options provided are silica, carbohydrate, proteins, and calcium. We need to determine which of these is correct based on the information about Euglena.

**Hint:** Recall which materials are commonly associated with the cyst walls of protists and other unicellular organisms.

### Step 5: Conclude with the Correct Answer
After evaluating the information, we find that the cyst wall of Euglena is primarily made of carbohydrates. This is distinct from other organisms like diatoms, which have silica in their cell walls.

**Final Answer:** The cyst wall of Euglena is formed of **carbohydrate**.