Which of the following is not a type of passive transport?

Step 1: Define the Problem

Identify which option among the given choices is not a type of passive transport.

Step 2: Break Down the Problem

Passive transport involves the movement of substances across cell membranes without the need for energy input. Common types include:

• Diffusion
• Osmosis
• Facilitated diffusion

Step 3: Apply Relevant Concepts

Understand the characteristics of passive transport:

• Does not require energy (ATP)
• Moves substances down their concentration gradient

Step 4: Analysis, Verify and Summarize

Analyze each option to determine if it requires energy or moves substances against their concentration gradient, which would classify it as active transport instead of passive.

Final Answer

The option that involves energy use or moves substances against their concentration gradient is not a type of passive transport.