Which substances are contained in saliva and tears to break down pathogens? a. enzymes
b. oils
c. acids
d. sweat

What is the difference between bacterial infections and viral infections?

1. which of the following transport mechanisms utilizes energy? a. osmosis b. diffusion c. facilitated diffusion d. endocytosis

Which to produce involved from a symbiotic relationship of organisms which resulted in eukaryotic organisms contain chloroplast