Which one of the following does not have an intermediate host?

• A. Tapeworm
• B. Ascaris
• C. Liver fluke
• D. Plasmodium

To determine which organism does not have an intermediate host, let's look at each option:

Organism Overview

• Tapeworm: Typically requires an intermediate host, often a fish or livestock, to complete its life cycle.
• Ascaris: This roundworm does not need an intermediate host; it develops directly in the human intestine.
• Liver fluke: This parasite usually has one or more intermediate hosts, such as snails.
• Plasmodium: The malaria-causing parasite has a complex life cycle involving mosquitoes as intermediate hosts.

Final Answer

The correct choice is Ascaris, as it does not have an intermediate host in its life cycle.