Answer: Hindi ko maintindihan kung ano ang mga pagong?
Explanation:
Since pathogens are easily passed from person to person, they need large populations to spread and survive. If they did not have a large population, the pathogens would die out.
Answer: red blood cells
Explanation:
Hemoglobin, iron-containing protein in the blood of many animals—in the red blood cells (erythrocytes) of vertebrates—that transports oxygen to the tissues
