An advantage of a filter is it cleans the water better then the screen
A disadvantage is that you need to wash and sometimes fix the filter
10! skeletal,muscular,nervous,endocrine,cardiovascular,lymphatic,respiratory,digestive,urinary and reproductive system
Pathogens are spread from bacteria, this bacteria travels throughout the air meaning another person gets it. Some things that can be prevented is take antibiotics to fight the bacteria off and washing your hands daily, also cover your mouth when coughing and sneezing to somewhat stop spreading the bacteria
I can't read the paper, so all I can say is read Darwin's Survival of the Fittest and you will understand evolution.
Cell membrane .
Photopigments
MItochondria
Nucleus
Contractile vacoule
