Carla, curious as to the cause of disease in her mother's plants, designed the following experiment. She
Question:
Carla, curious as to the cause of disease in her mother's plants, designed the following experiment. She crushed the infected leaves with sterile water. Then, the solution was filtered once through a funnel filter and once through a 0.4 micron filter. Both the filtrate and residue of each filter were kept and tested by rubbing each, individually, onto uninfected plant. The table below shows the result:
Infection No infection
Funnel filtrate X
Funnel residue X
Second filtrate X
Second residue X
Which one of the following is the most likely pathogen? (choose all correct answers)
a) virus
b) bacteriophage
c) bacterium
d) fungus
e) none of the above
Physics
ISBN: 978-0077339685
2nd edition
Authors: Alan Giambattista, Betty Richardson, Robert Richardson