In the life cycle of sexual reproducers, what name is given to the host in which the parasite undergoes sexual reproduction?

• A. Intermediate host
• B. Reservoir host
• C. Paratenic host
• D. Definitive host

Answer: (D)

Verified step by step guidance

1. Understand the life cycle of parasites: Parasites often have complex life cycles that involve multiple hosts. These hosts can be categorized based on the stage of the parasite's life cycle that occurs within them.
2. Define the term 'Definitive host': In the context of parasitology, the definitive host is the host in which the parasite reaches maturity and, if applicable, undergoes sexual reproduction.
3. Differentiate between host types: The intermediate host is where the parasite undergoes asexual reproduction or development, but not sexual reproduction. The reservoir host is a host that harbors the parasite without being affected by it, serving as a source of infection. The paratenic host is a transport host where the parasite does not undergo development.
4. Identify the role of the definitive host: Since the definitive host is where the parasite undergoes sexual reproduction, it is crucial for the completion of the parasite's life cycle.
5. Conclude that the correct term for the host in which the parasite undergoes sexual reproduction is the 'Definitive host'.