A pathogen or infectious agent would be a parasite, fungi, bacteria or virus that is bad for our health. One type of pathogen or infectious agent would be the common cold. You can prevent the spread of the common cold by washing hands with antimicrobial soap often and staying away from others who are sick. Doing this would greatly reduce the chance that you'd get sick, too.
Well, plants have a vascular system whereas animals have a circulatory system. They both utilize tube structures that transport water and nutrients to the cells and different parts of the organism. Plants have xylem and phloem and animals have veins and arteries. An animal's circulatory system is driven by a pump, via the heart. A plant's vascular system is driven simply by gravity and the many useful properties of water. Plants have water-based solutions within their vascular systems and animals have mainly white and red blood cells within their circulatory systems.
Answer:
B: A whole set
Explanation:
The only cells in your body that don't are sex cells. ie. Eggs and Sperm
I believe the first and last answers are the most environmentally conscious answers.