ANSWER FOR QUESTION 1:
 The most common type of E. coli infection that causes illness in people is called E. coli O157, which produces a toxin known as Shiga-toxin. Shiga-toxin producing E. coli is abbreviated as STEC. Symptoms of infection with this germ include watery or bloody diarrhea, fever, abdominal cramps, nausea, and vomiting.
ANSWER FOR QUESTION 2:
Some other germs don’t cause as many illnesses, but when they do, the illnesses are more likely to lead to hospitalization. Those germs include: Anyone can get sick from eating contaminated food. Follow four simple food safety steps —clean, separate, cook, and chill—to lower your chance of food poisoning and to protect yourself and your loved ones.
 
        
             
        
        
        
Most animal cells differentiate at an early stage
        
                    
             
        
        
        
You have give the question because we need to look the f1 generation traits first
        
             
        
        
        
You should mix 
4µl of DNA sample and complete it with 
96µl (100-4) of water.
You can figure this out by using  
C1.V1 = C2.V2C1 = 250 <span>ng/μl (Sample Concentration)
</span>V1 = ?        
  (the necessary volume to take from the DNA sample)C2 = 10 <span>ng/μl (PCR concentration)
</span>V2 = 100 µl (total volume)
V1 = 

 = 

 = 
4µl
For the water: 100µl (total volume) = 4µl + Water
Water volume = 96µl
 
        
        
        
Answer: 1)  Eurasian water millfoil
                2) Gold
                 3) A
Explanation: