Maximum speed of a protist is

Options

A. 20 `mum//sec`
B. 2.0 `mm//sec`
C. 200 `mum//sec`
D. 2 `cm//sec`

Answer

To determine the maximum speed of a protist, we can follow these steps:

### Step 1: Understand the Movement Mechanism
Protists are unicellular eukaryotes that can move using specialized structures. The primary structures involved in their movement are cilia and flagella.

**Hint:** Think about the types of locomotory structures that protists use for movement.

### Step 2: Identify the Speed of Movement
Among the various types of protists, those that are ciliated or flagellated tend to move faster than those that do not possess these structures.

**Hint:** Consider which types of protists are likely to have the highest speeds based on their locomotory structures.

### Step 3: Compare Given Speed Options
The question provides several options for the maximum speed of a protist:
- 20 micrometers per second
- 2.0 millimeters per second
- 200 micrometers per second
- 2 centimeters per second

**Hint:** Convert all speeds to the same unit if necessary to make comparisons easier.

### Step 4: Determine the Fastest Speed
It is noted that flagellated protists can reach speeds up to 2.0 millimeters per second. This is the highest speed mentioned among the options provided.

**Hint:** Look for the option that matches the known maximum speed of flagellated protists.

### Step 5: Conclusion
Based on the information, the maximum speed of a protist is 2.0 millimeters per second.

**Final Answer:** 2.0 mm per second