Parasites need what to live and reproduce?

Parasites need what to live and reproduce?

• A. Need a host to live and to reproduce
• B. Grow only in air
• C. Multiply without a host
• D. Are never infectious

Answer: (A)

Parasites depend on a host to survive and reproduce. They rely on the host for nutrients, shelter, and the specific conditions their life cycles require, so they can’t sustain themselves or multiply without a host. That’s why needing a host to live and reproduce is the correct idea. Options suggesting growth in air, multiplying without a host, or never being infectious don’t fit how parasites operate, since their life cycles typically hinge on a host and they often produce infectious stages that move between hosts.

Parasites depend on a host to survive and reproduce. They rely on the host for nutrients, shelter, and the specific conditions their life cycles require, so they can’t sustain themselves or multiply without a host. That’s why needing a host to live and reproduce is the correct idea. Options suggesting growth in air, multiplying without a host, or never being infectious don’t fit how parasites operate, since their life cycles typically hinge on a host and they often produce infectious stages that move between hosts.