Organs or organ systems are directly below the hierarchical organization of life. For an organism to act or function properly organ systems are needed to exist. The following are examples of organ systems that are needed by an organism:
1. Nervous System
2. Digestive System
3. Reproductive System
4. Respiratory System
5. Muscular System
6. Skeletal System
7. Endocrine System
8. Immune System
9. Excretory System
10. Circulatory System
11. Integumentary System
Pathogens are disease-causing agents which can be transmitted between people and infected animals. Pathogens involve bacterium, virus, or other microorganism that can cause disease.
Pathogens can be given off and carried in the air when an infected individual comes in contact with another individual . Correct answer: A
Please add more information
Answer:
don't know. his case is getting complicated day by day. lot of well named people r behind all this.
hope he gets justice...
