Parasitic strains of E. coli may produce poison- ous chemicals that attack living tissue and cause
disease in humans. These chemicals are called
(1) antibodies
(2) toxins
(3) viruses
(4) antibiotics

that scientist would be robert hooke

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

gag reflex, poor dentition, gum retraction

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