Answer:
intestinal sickness are called Shiga toxins producing e coli
I'm pretty sure the answer would be A. Chromosomes contain one or more genes.
Answer: in order for a scientific investigation to be valid A hypothesis must be tested throughout a Scientific investigation that can gather evidence and support it.
Explanation: in any scientific investigation you have to have a testable hypothesis, without your hypothesis it’s not really a scientific investigation.
Hope this helped!
Answer: D) ALL THE ABOVE
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