Auxospores and hormocysts are formed respectively by

Options

A. Several diatoms and few cyanobacteria
B. Several cyanobacteria and several diatoms
C. Some diatoms and several cyanobacteria
D. Some cyanobacteria and many diatoms

Answer

To solve the question "Auxospores and hormocysts are formed respectively by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Auxospores**:
- Auxospores are reproductive structures that play a role in the life cycle of certain organisms.
- Specifically, auxospores are formed during the sexual reproduction of **diatoms**. Diatoms are a group of microalgae known for their unique silica cell walls.

2. **Understanding Hormocysts**:
- Hormocysts are a type of resting stage or dormant structure.
- They are formed by certain types of **cyanobacteria** (also known as blue-green algae). Hormocysts serve as a survival mechanism for these organisms under unfavorable conditions.

3. **Identifying the Organisms**:
- From the above information, we can conclude:
- Auxospores are produced by **diatoms**.
- Hormocysts are produced by **cyanobacteria**.

4. **Selecting the Correct Option**:
- Given the options provided in the question, we need to find the one that states:
- "Auxospores from diatoms and hormocysts from cyanobacteria."
- After reviewing the options, we find that the correct answer corresponds to the combination of diatoms and cyanobacteria.

### Final Answer:
Auxospores are formed by **diatoms**, and hormocysts are formed by **cyanobacteria**.

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