I think it's ameoba but I'm sorry if I'm wrong
Answer:You can get infected by swallowing Shigella. Some ways Shigella can get into your mouth are:
Getting Shigella on your hands and touching your mouth. Shigella can get on your hands by:
Touching surfaces, such as toys, bathroom fixtures, changing tables, and diaper pails contaminated with Shigella bacteria from someone with an infection.
Changing the diaper of a child with a Shigella infection.
Taking care of a person with an infection, including cleaning up after the person uses the toilet.
Eating food prepared by someone with a Shigella infection.
Swallowing recreational water, such as lake water or improperly treated swimming pool water.
Swallowing contaminated drinking water, such as water from a well that’s been contaminated with sewage or flood water.
Exposure to stool (poop) during sexual contact with someone with a Shigella infection or who has recently recovered from a Shigella infection.
Explanation:
<h3><u>Answer;</u></h3>
Potassium-40 has a half life of 1.25 billion years.
<h3><u>Explanation;</u></h3>
New amount = Original amount × (1/2)^n ; where n is the number of half lives.
Original amount is 50 atoms
New amount is 25 atoms
Therefore;
25 = 50 × (1/2)^n
1/2 = (1/2)^n
Thus; n = 1
n = 1 which is equivalent to 1.25 billion years
Therefore;
<u>Potassium-40 has a half life of 1.25 billion years.</u>