Answer:
Option A, pathogen A
Explanation:
ID50 is a way to measure the virulent efficiency of a pathogen. ID50 for a pathogen depicts the number of pathogens required to infect or cause the associated disease with in 50 percent of any population sample.
This means that 50 pathogens A can infect 50 percent of any sample population.
While 1000 pathogen B and 1000000 pathogen C are required to infect 50 percent of any sample population.
hence, Most virulent pathogen is Pathogen A
The answer is 'The Biosphere.'
A. the population of higher trophic levels is greater than lower trophic levels
It provides protection for the plant cell and supports the shape of the cell.
