Answer:To achieve and maintain lifelong fitness, you need to avoid substances that can harm you.
Explanation:
Answer:.4.Microorganism X might not be linked to floppy ear disease, because the inoculated mouse remained healthy.5.Microorganism X modified its cell wall structure while being cultured, and is no longer infectious to rabbits.6.A laboratory mouse might not be an appropriate, susceptible host; an experiment with a laboratory rabbit may be needed.
